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Jahan
Kosha
Cannon
(also
known
as
the
Great
Gun,
and
literally
means
the
Destroyer
of
the
World)
is
placed
in
the
Topekhana,
400
m
to
the
south
east
of
the
Katra
Mosque,
in
the
town
of
Murshidabad,
West
Bengal,
India.
Topekhana
was
the
Nawab's
Artillery
Park
and
the
entrance
gate
of
the
old
capital
of
Bengal,
Bihar
and
Orissa,
the
city
of
Jahangir
Nagar.
It
is
protected
on
the
east
by
the
Gobra
Nala,
locally
known
as
the
Katra
Jheel.
Here,
the
Jahan
Kosha
Cannon
is
laid
to
rest.
Before
being
placed
at
its
current
location,
it
rested
on
a
carriage
with
wheels
and
was
surrounded
by
the
roots
of
a
Peepal
tree.[1]
The
growth
of
the
tree
roots
gradually
lifted
the
gun
four
feet
above
the
ground.
The
wheels
of
the
gun
carriage
have
disappeared,
but
the
iron-work
of
the
carriage
and
the
trunions
are
still
visible.
The
cannon
is
made
of
ashtadhatu
or
8
metals,
namely
silver,
gold,
lead,
copper,
zinc,
tin,
iron
and
mercury.
The
cannon
is
more
than
7
tons
in
weight.
It
is
17
feet
and
6
inches
in
length
and
3
feet
in
width.
It
has
a
girth
of
5
feet
at
the
touch
hole
end.
The
circumference
of
its
mouth
is
more
than
one
foot.
The
radius
of
the
touch
hole
is
one
and
a
half
inches.
In
order
to
fire
this
cannon
once,
17
kilograms
of
gunpowder
was
needed.
The
bore
is
approximately
6
inches.
The
cannon
was
made
in
1637
by
Janardan
Karmakar,
a
blacksmith
and
gunsmith,
under
the
instructions
of
Daroga
Shere
Mohammad
and
under
the
supervision
of
Hara
Ballav
Das.
The
cannon
was
made
in
Dacca,
when
Shah
Jahan
was
the
Mughal
emperor,
at
the
instance
of
Islam
Khan,
who
was
the
Subedar
of
Bengal.
This
is
confirmed
by
an
inscription
engraved
on
it.
However,
the
cannon
has
several
other
names
like
the
"Great
Gun",
the
"Destroyer
of
the
world",
the
"Conqueror
of
the
universe",
the
"World
Subduer"
and
so
on.
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