The Jesus Monastery in Aveiro is one of the city’s most important historical buildings and is well worth a visit if you are in the city for a few days. The Jesus Monastery is located right in the heart of the city, opposite to the cathedral and close to many of the city’s major attractions, including the lagoon, Forum Aveiro, the fish market, and the lovely green, park areas.
http://www.ezportugal.com/aveiro-portugal/attractions-aveiro-portugal/jesus-monastery-aveiro