Citania de Briteiros is a Portuguese archaeological site containing the ruins of an ancient settlement. In fact, dating back to the second century BC, Citania de Briteiros was home to a people known as part of the castro culture, named as such because the high areas on which they settled where known as "castros".

Today, visitors can see the remains of Citania de Briteiros Iron Age hillfort, circular homes and a cremation furnace. There’s also a small exhibition of excavated finds.