Best places to visit in Viseu

Viseu (Portuguese pronunciation: [viˈzew]) is a city and municipality in the Centro Region of Portugal and the capital of the district of the same name, with a population of 99,274 inhabitants, and center of the Viseu Dão Lafões intermunipical community, with 267,633 inhabitants.
It's 14:41 right now , with light rain and the temperature of 27.06°C (80.708°F) in Viseu.