Aveiro's cultural heritage is closely linked to its unique geographical location on the Ria de Aveiro. Originally a fishing port, the city developed into an important center for salt production and fishing in the Middle Ages. An economic crisis in the 16th century, caused by the silting up of the harbor mouth, led to a profound transformation, from which Aveiro only re-emerged in the 19th century with the reopening of the canals and the rise of industrialization.The city's architecture bears witness to this history and, in particular, to the prosperity of the turn of the century. Numerous buildings in Jugendstil (Art Nouveau) characterize the cityscape along the canals, often adorned with the distinctive Portuguese Azulejos (tiles). An iconic cultural asset are the colorful Moliceiros, traditional boats originally used for gathering seaweed and now serving as gondolas on the waterways.Local traditions include the age-old salt production in the Salinas as well as culinary specialties like the sweet Ovos Moles, an egg yolk pastry with monastic origins. The Mosteiro de Jesus, today the Museu de Aveiro, houses not only religious art but also the tomb of Saint Princess Joanna of Portugal and is a central place for understanding the region's religious and artistic heritage.