Marvão castle

The medieval castle was mostly built after 1299, and features many characteristic features of a crusader-era castle: a tall central keep with raised entrance on the first floor; a series of lower, outlying turrets (some semi-circular); high-placed arrow-slits; open spaces to aid the sheltering and assembly of villagers and troops; a well, and huge rain-collecting cistern to supply water to both keep and the wider castle in the event of siege; bent entrances (both on the village and castle gates) to slow down invaders in the event of breached gates; a series of narrow killing zones (notably, in the triple gate on the village-side of the castle); extensive crenellated battlements and curtain walls that enhanced the natural defences provided by the escarpments of Marvão's rock.