The core fortified area of a town or city is known as a citadel.
World Atlas in Exalted: in the Age of Sorrows
Citadelle Laferrière - Mountain Fortress In Haiti - WorldAtlas
World Atlas in The Radiant Citadel
The map of the Citadel : r/MonsterHunter
Gaza Strip - WorldAtlas
World Atlas in The Radiant Citadel
ANTIQUE MAP SIEGE PLAN OF CITADEL TURIN by AUST'S 1799 PUBLISHED GARDINER 1812
Why Does Lithuanian Language Fascinate Linguists?, by 🔘 Paulius Juodis
My map of the city Oakhurst from The Sunless Citadel adventure module [OC] : r/DnD