In the past, it was a thriving town due to its’ location, close to the coast and fertile lands. During the Moorish era the River Arade was significantly wider allowing boats to navigate along its length to Portimão and the sea. At one point, during the Muslim rule, Silves had 30,000 people living in it. As the history changed its course river silted up the prosperity of Silves dwindled and the town was reduced to a population of less than 500 people. In one of the photos inside the building, it shows city walls and the River Arade, castle and cathedral of the city.