A fortified entrance is commonly referred to as a "gatehouse" or simply a "gate." These structures are designed to provide security and protection, often featuring thick walls, towers, and defensive mechanisms. Historically, they were integral to castles and walled cities, controlling access and enhancing defense against attacks.
Gatehouse
Port Royal
Port Royal
A fortified town for self-defence, with entrance gates and walls.
A barbacan is an archaic term for a barbican, a tower at the entrance to a castle or fortified town, or a fortress at the end of a bridge.
Fortified dwellings of the Middle Ages were castles and fortified manor houses. Not all dwellings were castles, however.
acropolis
Madeira
this is called arienites
fortress
The entrance to a house is called "l'entrée" in French.
Well his 3rd entrance is called here and now or never.