Palmela castle is one of the most impressive sights in the Lisbon region. Occupied, conquered, lost and regained, it is a faithful testament to the battles waged during the first royal dynasty (1143 to 1383) to establish the territory of Portugal. Erected at a uniquely strategic point, between the Tagus and Sado rivers, it was founded by the Romans, probably in 310 BC. But the first fortifications were built by the Moors from the 8th to 9th centuries. The castle was successively added to: the primitive round towers by the Romans; the square towers by the Moors; the entrance tower by the Master of Avis; and the cannon fortifications by Pedro II. It has a great view of the Arrábida hills and Sado estuary. It also houses two churches, one lined with 17th-century tiles and a set of 16th-century graves. Come and visit for its view and unique location.