Citadel is a fortress located on the top of the strategic Gellért Hill in Budapest, Hungary. From there you can see a very good panoramic view of the whole city of Budapest, its eight bridges and the famous Danube river.
The fortress was built in 1851 by Julius Jacob von Haynau, a commander of the Habsburg Monarchy, and designed by Emánuel Zita and Ferenc Kasselik, after the Hungarian Revolution of 1848. It occupies almost the entire 235 metres high plateau. The fortress is a U-shaped structure built about a central courtyard, being 220 metres long, 60 metres wide, and 4 metres tall. It had a complement of sixty cannons.