almourol templar castle, located in an islet in the tagus tiver, central portugal

12th afonso ages alans allures almorolan almourol ancient arches architectural architecture battlements building castle central centuries century courtyard defense defensive dom enclosure feudal henriques historical islet keep king kingdom knights masonry mediaeval medieval middle moors oldest outcrop pillars portugal portuguese rebuilt records redoubt river stone strategic structure style tagus templar templars tower vaults visigoths watchtower zaordf zere