Detail of one of the oldest Mudejar floors in Portugal, possibly consisting of tiles produced in Seville, and perhaps dating from the building campaign promoted by King Afonso V, in the mid-15th century. Although tradition has attributed the wearing down of this rare tiled floor to the fact that King Afonso VI used to walk constantly back and forth from his bed to the window overlooking the Serra de Sintra, the truth is that the floor had already been in place for more than two centuries when this king was imprisoned here, between 1674 and 1683, on the orders of his brother King Pedro II.