Gatehouse
A gatehouse was a strong building built over the gateway to a city or castle. A gatehouse is found on European castles, manor houses and mansions.
Sometimes gatehouses defended a town by being built across a bridge, a river or a moat, as in Monmouth.
English gatehouses
French gatehouses
Gatehouse Media
Barbican gate of Glenarm Castle, County Antrim
German gatehouse in Lich, Hesse built in 1782
Kankaimon, the outermost defensive gate of Shuri Castle
Puerta del Sol Moorish gateway from Toledo, Spain
Ganesh Pol is one of the seven gates of Amber Fort built between 1611 and 1667, India