Citadella

right|thumb|The Citadella upon Gellért Hill, Budapest. right|thumb|The Citadella from above.

The Citadella () is the fortification located upon the top of Gellért Hill in Budapest, Hungary. Citadella is the Hungarian word for citadel, a kind of fortress. The word is exclusively used by other languages to refer to the Gellért Hill citadel which occupies a place which held strategic importance in Budapest's military history.