The ancient citadel of Athens was the Acropolis. This citadel is located on a high outcrop above Athens. It was built in the 5th century B.C.
Citadel
Acropolis
The Acropolis.
The Parthenon
The upper part, or the citadel, of a Grecian city; especially, the citadel of Athens.
The upper part, or the citadel, of a Grecian city; especially, the citadel of Athens.
An ancient citadel - a group of buildings - in Athens, in ancient Greece.
The fortress can also be called a citadel. Hope this helps :)
You may be referring to the Kremlin.
A high rocky hill on or near which early people built cities is called a citadel or acropolis. These fortified elevated sites provided strategic advantages, such as defensive positions and improved visibility, making them ideal for early settlements and city-building. Examples include the Acropolis of Athens in Greece and the Citadel of Machu Picchu in Peru.
The word you are looking for may be 'citadel.' Or, if the city is Athens, Greece, the word may be 'acropolis.'