A citadel is a big, gigantic castle fortress
Citdel: A fortress for protecting a town, sometimes with a castle in its middle. Citadels are most often used to protect a garrison or political power from the inhabitants of the town it's defending....
A. J. Cronin
cit·a·del [sit-uh-dl, -uh-del]
Christophe was born on October 13, 1945.