Located on the top of an elongated and steep hill and articulated with an impressive belt of walls that hug the urban hull all the way to the downtown area, next to the Guadiana river, Mértola castle provided exceptional conditions for defending and controlling the surrounding territory. In the timeline, it succeeds previous fortified structures, in a structural evolution of imprecise contours, which chronologically extends from the Iron Age to the Almohad fortress that the knights of Santiago conquered in 1238. Ler mais National Castles Day – 7 October 2021 – Mértola Castle