Bastile
Bastile (bȧs*tēl" or bȧs"tel; 277) , noun
[French bastille fortress, Old French bastir to build, French bâtir.]
1.
(Feud. Fortification) A tower or an elevated work, used for the defense, or in the siege, of a fortified place.
The high bastiles... which overtopped the walls.
2.
“The Bastille”, formerly a castle or fortress in Paris, used as a prison, especially for political offenders; hence, a rhetorical name for a prison.
Also: Bastille