A great museum and you should visit if you want to know about Irish history. Definitely you will need at least 2 hours just to see the items which they have. You will love it if you like history, they have items dating back to 2500bc. The building itself is great to see. Toilets are there inside museum. Wheelchair accessible is there. The entrance is free for all..

Great experience and exhibition. Vikings, ancient Egypt are impressive. I love this place don't to mention building itself. Unfortunately the beautiful entrance presently is renovated and you will have to come again to see it.

Went for my birthday (7th June) with the family, kids loved it and so did we, some very interesting items and a lot enriched with History but unfortunately we had a this big guy of a security guard follow us constantly from exhibit to exhibit and even followed us outside when leaving where the benches are outside the front entrance. Why he was following us, I don’t know? It’s not like we’re thief’s or grave robbers, just a family of 5 trying to enjoy a birthday. Quite disappointing really as it did ruin the experience.

Pretty interesting museum and has a good selection of exhibits. Worth a visit if you have time but nothing to plan a day around. Currently undergoing some reconstruction and that ruins the flow of the museum and half the exhibits were closed and you had to enter through the gift shop which was very messy. Might be better when it’s finished

A really fascinating place to go most of the finds are from Dublin castle. The museum is multi story with some amazing artefacts, the museum is free and not far from the town centre in easy walking distance.

Really good place given the free entry. Excellent Viking component that shows no-one drove them out of Ireland, rather they form the basis of the country and integrated and contributed to its foundation and development. Very good Bronze Age jewellery and early prehistory. Excellent museum, good shop and great cafe highly recommended 👍 👌 😀 👏 😊 🙂 👍 👌 😀 👏

Very interesting, lots to see with videos and great descriptions that really tell a story. The new Viking exhibit is colorful and lively which is ironic for a archeology museum, kids seems very engaged and the building itself and beautiful with amazing architecture.

A visit to the museum is a good way to spend a rainy afternoon. Nevertheless this place is fine on other days too. It's a bit small when compared to the other museums that I've visited. But it still retains its charm( some is lost due to the construction and upgradation works). Go ahead and give it a shot.

The most interesting thing about the museum is definitely the beautiful and marvellous building it's situated in. The exhibition itself is really ordinarily curated and made, with no modern approach, but there are still captivating things to see. The entry is free, which is amazing.

A surprisingly large museum with many famous and beautiful items. The context is great and the presentation is informative. I didn't finish the museum because I was tired. I highly recommend a visit. The shop is nice

One of the best museums I have visited. It has a great collection of everything you need to understand the history of a country. I was pleasantly surprised with this visit that it is also open to the public for free.

Fascinating exhibits. Even if the place is undergoing renovation now it’s still pretty big and lots of things to see. I went a little late so didnt get to see all the sections. Im already impressed of what i saw esp the vikings exhibit but will comeback for those i missed. I think this place is worth the visit when you are in Dublin and the entrance is free!

A really nice museum. It's not very big so you can just visit in 1hour but it's very well made. The visit starts with lots of items from the steel era and you can observe really nice and well preserved swords. The descriptions are well documented, maybe a little bit tricky for non-english-speaking people since it has a lot of vocabulary we are not used to. Upstairs you can see more differents items such as religious staff and a lot of viking vestiges. They even offer small activities like listening to poems or reproducing Irish pattern on paper. The visit is totally free so you don't have to book any tickets. The venue is really beautiful so if you are in the center of Dublin, maybe give it a try.

I just loved this museum. It is very manageable to visit it within a couple of hours so you don’t get overwhelmed. My top pick would be the bog bodies as they are so well preserved. Laid out in an excellent manner with plenty of description. Lots of information about the Viking period too which I thoroughly enjoyed.

This museum is a must-see! Firstly, it's more than worthy of a donation since admission is free, but the facility and artifacts are priceless. It's not so huge that you are overwhelmed, but big enough so it's not crowded. It's in Ireland, so no need to say how friendly the people are; so polite, wonderful, and helpful. And, there are bog bodies.

A lot more impressive than I expected. Exploring the history surrounding the exquisite metalwork skills and craftsmanship of the early Irish through the ages, all set in a beautiful museum building, was just an amazing way to spend a few hours in Dublin. So glad I went and it's free!

We were so impressed that we got to enjoy all the marvellous installations and exhibitions for free! The building itself is a piece of art, and the exhibitions were amazing! It took us almost two hours to have a quick tour, but I’d be happy to stay for more. The kids loved it too!!

Very interesting place very well displayed artifacts with nice clear descriptions on them. Helpful staff.

Surprising amount of artifacts at this museum and well presented. Well worth a visit for 1 or 2 hours. The gold displays were stunning.

I love mid-sized, well planned and created museums, this is one! You can travel through time in Irish history, with great details of the everyday life of Irish people from the beginning of times up until the medieval era. Spend some hours here, it is an amazing experience and also free :).

This was a good experience even though the main entrance was under renovation. Several time periods are portrayed, there's even an exhibition on ancient Egypt. But the best *by far* was the bogmen... I have never seen anything like that, however viewer discretion is strongly advised...

Great museum with extensive archaeological collection. The bog exhibit is particularly fascinating with intact human remains. Also excellent was the gold hoarded which were well displayed. Viking exhibit was very good. This is a must see and it’s FREE !!

Absolutely amazing museum and the perfect place to shelter for a few hours from the rain. There are various exhibitions from across Ireland's historic time line. The Bog Men are both weird and fascinating at the same time. Loved the Viking section too. This is one of Dublin's free museums but leave a donation!

It's one of the best archaeology museums around, and it's free to enter. The array of items on display was amazing. However, it was the remains of the people found in a peat bog that was fascinating. Well worth visiting.

This is a great museum and it's free! Highly recommend having a walk through. Coming from the States, it was very interesting. US history often "starts" around 1620, and it's easy to forget that some of our ancestors crossed the Atlantic. As someone of northern european descent, it was very interesting and enlightening to see the exhibits on stone age tools and culture.

Nice, free museum with friendly staff and a variety of exhibits from different eras and catering to many different interests. FYI, They do not store luggage, in case anyone is traveling with some.

If you have the time, this is a must visit, especially if you like bling, there is plenty to see allow at least an hour, our fave is the gold exhibit.

I had an amazing time at the National Museum of Ireland-Decorative Arts & History ! It's a fantastic place for both children and adults to learn about art history well-maintained, and the staff is friendly and knowledgeable.

This is an archaeological museum located in Dublin. Few km from the central bus station. The museum is free of entry and displays items from stone age till the Irish independence. These are fun for the kids to learn about several thousand years of history. Roughly takes an hour to browse through the items on display.

Everyone just has to visit the museum at least once in their lives. If you like museums and you like archaeology, then this is an absolute must! The museum is a Victorian building, I think from the 1890’s. Situated in Kildare Street in Dublin 2. The bog bodies are amazing to see, if not a little strange to see in real life. Only ever seen them on the tv. The historical artefacts at the museum range from the Stone Age to the late Middle Ages. Some amazing things from Celtic Ireland to Viking Ireland. So much to look at and learn and great for kids to have a wonder and learn as they go. Everything you need to learn about Irish history! Everything from axe heads, Bronze Age gold artefacts, to the Tara brooch are on display, I believe permanently. Cafe available inside for snacks and hot drinks. Really easy to get to and easy to get around. It’s a must! An absolute must!

Truly magnificent collection housed inside an equally impressive building. Free admission but online booking is needed.

Interesting displays with clear text explaining the context and derivation. More extensive finds from the neolithic and bronze age and some Egyptian and good Christian era artifacts. From simple golden torcs to stylised celtic designs.

Must see the treasure room . The Ancestors left us wonderful icons

Fantastic! The staff was extremely politey helpful and friendly. It was indescribably nice to get some culture after the lockdown. Definitely worths a visit, or more :)

Obviously things have been rearranged for ideal flow during covid, so the experience is somewhat changed. I think they did a great job all things considered. The prehistoric displays were fascinating and I appreciated that the bog bodies were easy to access but hidden from direct view. I'm not squeamish but they are very dramatic to see and I think that the display is well done. I would love more detail on the Orgham writing, as I had trouble discerning the marks on the rock and would love to know more about how the writing works and how it was identified/decoded. The building itself is beautiful and the staff are friendly and unobtrusive. Absolutely visit. Admission is free but you MUST register for an appt online. You can't just show up. It won't work. Not even if you cry and try to come back in a series of disguises.

Nice museum. Very beautiful museum. Treasures of the history of Ireland, Celts and Vikings. I recommend to visit. Wonderful. Friendly staff, very good gift shop.

It is a good place with lots of history and irish culture . If you want to know deep about irish culture i say this will be a must . Just some maintenance going on at the moment .

Lovely museum to go see, they have lots of artifacts that were found here in Ireland, the building is building and unique. Would spend an hour or 2 here. Would recommend so see more of Ireland.

The museum was pretty good. I learned a lot about Irish history through the many ages, which was my goal. It was a little dry at times with a few highlights - the gold collection and the bog men. The medieval sections was closed.

At the moment the museum is under renovation, so some of it is closed. The remaining portion is not large, but there's many interesting and beautiful things to see. My favourite piece was a dress upstairs that had been pulled out of a bog, and I also loved the giant canoe. Really enjoyed the bog bodies exhibit which was presented thoughtfully and respectfully. There were some artefacts I'd never seen before, like gold and silver wirework and intricate manuscript boxes. Museum could do better in terms of accessibility- for example adding subtitles to any film exhibit as old footage can have poor audio quality, visitors may have English as a second language or be hard of hearing.

Clean, neat, and items worth viewing - from clay pots 750 bC, to historical leather books with Psalms , to golden jewellery to known crosses. And all of this is neatly presented, and for free. Do note that the museum closes punctually at 17:00. Staff greets friendly at the entrance, fluent English and positive body language. To read and view and google some questions and learn a bit more about certain objects, kings, crosses, customs, I recon allocate about 3 hours to not feel rushed.

This museum was educational and inspiring. Lots of information, but not at all overwhelming. The bog mummies were presented in a respectful way that was also easy for people who did not want view them. Great museum!

Has a nice big collection of artifacts from various ages. And it is a beautiful building, make sure to take a look at various mosaics on the floor and doors along with the collection pieces. Best of all, it's free!

Was amazing day out spent hours looking around they was so much to look at full off history they had a awesome part with lots of films you can sit and watch it’s free to get in and wasn’t that busy. The boat has on show was so big it’s so interesting how they found and dug it all up the mummy they had on show was very interesting too

Now I may be a wee bit biased, I am a trainee archaeologist. But Jesus isn't this place awesome, and unlike the British museum the place is (mostly) full of our own stuff. It's great to see so many artefacts open to the public. But definitely grab a drink/ snack beforehand because there's not any places to get drinks

Gorgeous stuff inside and everything is laid out nicely and neat Do check out if you've got the chance to Free admission and donations are greatly appreciated

Amazing exhibitions. Loved the shrines & historical facts! Must-see for families with kids. Free entrance, friendly staff!

This is an amazing museum with so much Irish history. Could spend hours here!!! Free admission

Indo-Canadian visiting from Toronto. Dublin’s museums are seriously impressive. Especially considering they are free to the public. This one is no exception. The prehistoric bog/peat bodies were the highlight for me though I’ll skip adding the photographs as they’re a bit disturbing owing to how well they’re preserved (which is also why they’re so interesting). The Irish gold exhibits on the ground floor, Catholic artifacts on the same floor and Egyptian section on the upper floor were other highlights for me. Bonus - an authentic Sheela-na-Gig can be found on the upper floor if you go looking for it. Highly recommend visiting - something for everyone and you’re likely to see something unusual you won’t find in other museums.

Fantastic museum with an interesting and fairly diverse collection. There were several very interesting and unique artifacts in their collection such as the Shrine of the Miosach and a bunch of viking artifacts. The building the museum is in is also very interesting and provides a great atmosphere to view the collection in. The room layout was fairly good, however there were a couple of side rooms that ended up being very cramped or had hard to navigate layouts.

Fabulous. Best museum I have seen in Ireland. But then again I love archaeology museums. Beautiful collection of gold objects, Celtic, Viking, Stone and Bronze Age. They even have an Egyptian room and of course the excellent Bog bodies.

I am not a huge museum fan, but this place blew my mind. The building alone is worth seeing. The contents were amazing. Must see!

Visited on a Monday afternoon, and there was quite a line forming before their opening. But the museum is quite spacious, so it didn't feel crowded at all. Saw the bog bodies and found it to be incredibly interesting - and a little freaky! There were also children visiting the exhibits. It was free entry and quite a lot to peruse. Would recommend for a nice activity in Dublin.

The National Museum of Ireland - Archaeology in Dublin is a treasure trove for history buffs. As soon as you walk in, you're greeted by ornate gold artifacts that showcase Ireland's rich past. The museum is well-organized, taking you on a journey from prehistoric times to medieval Ireland. The museum is spacious, allowing you to explore without feeling rushed. While it's rich in content, it's not overwhelming, making it accessible for all ages. A must-visit if you're keen on digging deep into Ireland's history! And there is even free entrence!

Really well laid out, starting you off with the very earliest excavations, with quite a linear route through to 1800s religion, warfare and living. There were guided tours, school trips and friendly, helpful security. No flash photography allowed understandably but regular photos seemed fine. Beautiful mosaic floors throughout. Gift shop was full of tasteful souvenirs and lovely gift cards and post cards.

I loved how it was totally free and had a pretty extensive and well organized early history of Ireland—always love to have context when I’m in a new place. The building is also beautiful and the workers are super kind. However, I have the same gripe I did with the British Museum: lack of accountability in the exhibit texts for the colonial practices that led to their possession of Cypriot and Egyptian artifacts. At this point, the museum narrative should take accountability.

The best archeological museum in my life! Very big royal building with mosaic floors, and beautiful doors. Very friendly peoples work here! And it’s for FREE!!! This is how should be! Strongly recommend!!!!

The National Museum of Ireland is a fantastic place to visit. The architecture of the museum is on its own something to behold. Beautiful artifacts that get your imagination going back in time. The artifacts are well described and explained. There is a shop included to get your memorabilia. Highly recommend a visit to the National Museum of Ireland. And it is free to visit.

Wonderful experience. The building in itself is already a national treasure, it is so beautiful everywhere you look. The exhibition is very interesting and takes you to multiple parts of history. There are a lot of rooms and there is a lot to see and read, I recommend spending a few hours there.

Beautiful building. No admission fee, just a donation option of €5. Loads of artefacts and history to enjoy. Beautiful pieces from hundreds of thousands of years ago. The good section is so impressive. The only improvement would in how the information is presented. It would be great to have more story telling. It could also be more interactive. They display everything beautifully. It's steeped in history which could be shared more. It's beside government buildings so a walk before/after is great. Parking at Dawson Street QPark is the handiest. Loads of bars/restaurants to choose from in this area.

If you decide to visit Dublin you should definitely have a look. There’s no entrance fee and it’s probably the most enjoyable way to learn about Irish history and culture. It could take up to 4 hours if you don’t want to rush.

Great place to learn about Irish history. Has many interesting exhibits ranging from the stone age, all the way to the medieval times. All items are very well preserved with appropriate labels which indicate the name and place of origin. One of the highlights of this museum are the bog men, which are very well preserved. The building itself has amazing architecture and an interesting layout. Fantastic for rainy days, or if you're a history enthusiast or simply wish to know more about Irish history.

Star attraction of the city if you’re interested in Archaeology. Great display of prehistoric material. Could always visit if in town.

Probably my favourite museum in Ireland. There is an absolutely wild amount of gold in this museum found from a variety of different hordes across Ireland over the years. They also have a wide array of artifacts from different parts of the county and different eras ranging from further back to the Stone Age. There is a lovely little cafe inside as well, it is a little expensive but admission to the museum is free so I suppose it isn’t too much to ask. The staff are super friendly and always willing to help and they also have visiting exhibits which change over sometimes. Admission is, as I said, free, like many public museums in Ireland, so leave a donation if you can!

The National Museum of Ireland is Ireland's leading museum institution, with a strong emphasis on national and some international archaeology, Irish history, Irish art, culture, and natural history. Beautiful building inside and out, plenty of fascinating information to keep you busy all day. Very enjoyable

Really good place given the free entry. Excellent Viking component that shows no-one drove them out of Ireland, rather they form the basis of the country and integrated and contributed to its foundation and development. Very good Bronze Age jewellery and early prehistory. Excellent museum, good shop and great cafe.

Great place for everyone. Beautiful building. Many different period and items, from human remains dug up from peat to gold jewelry, tombs, Viking ship reproduction, Egyptian mummies, swords... I had a great time there. And it's free, thank you very much!

A great, free experience provided by the goverment. Lovely building.

A fine museum. It's free, which is always a bonus and there are definitely some things worth seeing here. The bog people are a must-see, as their preserved bodies are quite impressive. The viking and Egyptian displays also have some good stuff, but this isn't the most elaborate museum to learn about these cultures. Don't get me wrong, it's still worth a visit, but if you're a frequent visitor of museums, this might not be the best choice for you. You could also just go see the bog people and leave again. The choice is up to you.

The history preserved here is phenomenal

Free museum, so whats not to like.

I visited the museum several times. It is a must for those interested in the prehistory and history of Ireland. You will find treasures such as golden torcs from the Bronze Age, a triplified stone head from Corleck, County Cavan, and even perfectly preserved bog bodies, that were probably ritually killed and sacrificed. The museum staff were friendly and helpful, and the visit felt really safe in the midst of a pandemic: the regulations to ensure physical distancing were crystal clear. Highly recommended.

Really nice museum, two floors, you can see in 1h everything. Free entrance, close at 20h. Recommended to go when is already dark so you can enjoy daylight for sightseeing.

Just a stunning amazing place, full of ancient artifacts and weapons

(Translated by Google) Not a large museum, but with truly magnificent finds of great historical-archaeological significance. Not to be missed, beyond the free admission. (Original) Un museo non grande, ma con reperti davvero magnifici e di grande rilevanza storico-archeologica. Da non perdere, al di là della gratuità dell'ingresso.

I used to get there almost every week

(Translated by Google) Very nice museum that teaches us a lot about the history of Ireland. Very friendly staff and the dome is just beautiful. Well if you are unlucky you will be out of the museum because the Chinese ambassador is visiting the museum (yes it is lived) otherwise a magnificent visit. (Original) Très beau musée qui nous apprend beaucoup sur l’histoire de l’Irlande. Personnel très sympathique et la coupole est juste magnifique. Bon si vous avez pas de chance vous serez sorti du musée car l’ambassadeur chinois est en visite au musée (oui c’est du vécu) sinon une visite magnifique.

If you want to learn Ireland in a best possible way and to have a fun as well, head to the National Museum of Archaeology, and immerse yourself in extraordinary exhibitions and galleries. They have brilliant exhibition about vikings, and you will learn everything about ancient viking culture exploring artfacts old centuries or watching interesting multimedia mats. They have an amazin souvenir shop as well, so after exploring you can visit ship as well. Prices are moderate and you can get great stuff as well. Highly recommended for travellers staying 7+ days.

Good for education but needs more from other countries on Artifacts

(Translated by Google) Free museum (Original) Darmowe muzeum

Loved it

(Translated by Google) Beautiful collection of artifacts in a historic building. It's free (Original) Bellissima collezione di reperti in un edificio storico. E gratuito

Very cool, I really liked of all exhibitions are there. A little Ireland history piece.

An interesting museum, some fabulous artifacts.

Nice museum and it is free, great place to learn about Irish history.

Great collection, stunning building!

Many wonderful exhibits for all ages. Wonderful experience and well worth a visit.

Must visit museum in Ireland if you're interested in history

So amazing, I could not take it all in. Will be scheduling another visit to see the rest of the fantastic exhibits. The staff is very professional and helpful, enjoyed myself immensely.

There is so much to see in this museum, but the signs aren't very descriptive so sometimes you need to do extra research to learn about things.

(Translated by Google) Gorgeous (Original) Lindo

Everyone should visit this museum, especially when exhibition has been changed.

An interesting afternoon, time to reflect on the past and plan for the future .....

Kids were reluctant to go!! Total attitude change when they got there. Loved it. 💚💚

Great place to visit

(Translated by Google) Fantastic! Curated exhibition and exceptional finds. The location is an ideal setting for an unforgettable walk from prehistoric times to the Middle Ages (Original) Fantastico! Esposizione curata e reperti eccezionali. La location è una cornice ideale per una passeggiata indimenticabile dalla preistoria al medioevo

Disappointed some content not available and some displays were repeats of other just stuff found in a different location

Drab and uninteresting.

Would have got 5 stars. But any family with a child or person in a wheel chair, well there's NO facilities for going up an down the various levels.

Brilliant

Excellent

Interesting museum, has a lot of archaeological pieces from all over Ireland. With covid restrictions is necessary to book the visit but it’s still free and plus, is very quiet! It’s not too big, the visit lasts around one hour. Advised if interested to history.

We love this place! Unfortunately due to covid-19 precautions more than half of the expositions are closed, quite disappointing.

Go to the first floor and find yourself in the vikings world. The skulls , the skeletons and village plans are my favourite

Compact enough to see in 1-2 hours but packed with plenty of interesting artifacts and treasures.

(Translated by Google) Worth the inspection, very cool museum (Original) Vale muito a vistoria, museu bem legal

(Translated by Google) Very beautiful museum and beautiful history (Original) Trés beau musée et belle histoire

Very interesting place must to see if you are interest in irish history.

Interesting articles and facts on display. We'll worth a visit ☺️ Quite large.

Absolutely amazing, loved their exhibit on Egyptian Culture.

Houses some of the most important Irish artefacts in an iconic building in the heart of the capital. There's no charge for your visit and you're also free to browse through a number of extra exhibitions on such subjects as the Battle of Clontarf and the monastic centre at Glendalough. Mandatory for anyone who wants to know more about Early and medieval Ireland, its Celtic roots and culture.

The best place to step back into Ireland's rich history by coming face to face with some of the most beautiful artefacts the country has to offer.

Loved it different variety of history to see here wasn't too busy, friendly staff too

The gentleman at the desk was very kind and welcoming and let us in on a busy Sunday. Be ready to be stunned, amazed and shocked. Piles of golden jewellery, shrivelled mummies with gripping stories, this museum has it all. I must say, the architecture of the building was the most beautiful aspect of the whole experience. Be sure to go on Sunday, outside busy hours, it's free and definitely worth learning about Irish history.

Nice place to kill an hour, away from the hustle and bustle of Dublin streets. The bog bodies is a fantastic exhibit, the museum also houses national treasures such as the exquisitely detailed ardagh chalice and Tara brooch.

Great museum. Lots of exhibits l. Shame medieval period was closed but otherwise easy to get in and well laid out. Must book for free in advance

Great collection, and beautifully exposed. Entrance is for free, I would definitely recommend

A good and informative place to visit in Dublin to get insight about Ireland history. It is well maintained and has nice staff.

I do recommend to visit this place... Free It has really unique pieces of art and one of my favorite ones was The bodies of Bog. You have to see it to believe it..

Satisfactory.. .. not a huge variety on display, but you will learn about bogs. Very small ancient Egypt section. Still worth visiting to learn about Irish ancestors and heritage.

I learned so much about Ireland's history here. I love biking history and I did not realize how much impact they had on Ireland

Bog body exhibit (what I came in for) was really interesting! Taking away a star for the way it was constructed - the information plaques are in the middle of the hallways which creates major congestion. These could easily be moved inside the pods with only a name and maybe a very short blurb on the outside so that people would still know what was within but didn't clog the hallways. Also minus one star for complacency in general British museum thievery nonsense

Awesome medieval history and artifacts. Amazing video room with archeologist explaining the artifacts!! Nice resting area. Beautiful historic building and architectural designs...the door carving 1880s and tile ceramic surrounds, love all of it. Mosaic floors throughout!!

So pretty ❤️ there were a lot to see, and just the building in its self is beautifull. The egyptian part was amazing.

Interesting Museum located in Dublin City. They have a large collection of animals, birds, insects etc.. that are all nicely preserved. The entrance is free. Takes a while to look at all the exhibits.

Free entrance is the only plus. An old museum with an old concept. I guess it is better with a guide and tried to find info for that on the web byt no info there... also a movie shown that didn't fit the sceeen... shape up it is your national history be proud and show it.

Seeing how worn the steps were...we were walking where thousands had walked before. So much information to take in. This place took over an hour, closer to two. It really does a great job depicting various eras of Ireland's history, which I knew very little of until I visited. Many lovely artifacts and works of art from long ago are preserved for all to see. It really ties everything together that you've learned about Ireland and its rich history.

Quite an amazing building, worth coming to just to see the style of design that was around at the time! Interesting range of exhibits if you like history from quite a while ago. Well worth a look!

I would definitely recommend a visit here while you're in Dublin. Beautiful building. No admission fee, just a donation option of €5. Loads of artefacts and history to enjoy. Beautiful pieces from hundreds of thousands of years ago. You'll take about 2 hours I'd say.

Beautiful museum with fabulous displays, full of archaeological treasures. Visit can take from 1 hr to a whole day (or more!) depending on how much you want to see. Definitely a must-see while visiting Dublin. Staff are also very nice and welcoming.