The Castelo de Silves is a medieval castle located in the town of Silves. It is one of the most important historical and architectural landmarks in the region and is considered a must-see destination for visitors to the area.

The castle was built in the 12th century by the Moors and was later conquered by the Christian armies during the Reconquista in the 13th century.

It was then rebuilt and expanded by the Portuguese and served as a crucial defensive structure during the wars and conflicts of the Middle Ages.