Built in 1851 at the order of François-Joseph, it crowns the top of mount Gellért. The Hungarian revolt of 1848-1849 having "shook" the Austrians, who saw in this defensive works a means to control the city. A hotel and a restaurant occupy part of the battlements. You can enter the compoundand walk around the path. From this belvedere, the view spreads right over the city below, Pest on the opposite bank and between them both, Marguerite Isle.