Citadell fortress
It is known as the Kremlin. Incidentally, Kremlin means a "fortress inside a city."
citadel
citadel- a fortress in a city.
Alhanbra
If it is in a city, acropolis(high city).
Polis is the Greek word for a city-state, that is a tract of farmland on which was built a city and its protective fortress (acro-polis = high city, that is the fortress on a hill, around which the city came to be built). It was independent - self ruled - which is why the term city-state is used.
crusaders
The Bastille (formally known as the Bastille Saint-Antoine) was a fortress in Paris, France.
lal haveli (red fortress) is a building in punjab city of Rawalpindi built in late 1800's by soojhan singh for his family ...
The Tower of London is a fortress on the north bank of the River Thames east of the city. The original part was built in 1078 as a fortress to protect the royal family but it is better known for being used as a prison. It also holds the Crown Jewels.
Dickville suckers