Western Europe

13th century citadel surrounded by 15 towers. In the centre is the 33 metre high keep, the Torre de Menagem https://www.travel-in-portugal.com/attractions/braganca-castle.htm

Classified as a national monument, nobody is quite sure what this unusual 12th century building was for! Built in a Romanesque style the building forms an irregular pentagon with a subterranean vaulted cistern https://www.travel-in-portugal.com/attractions/domus-municipalis.htm