The Srebrna Gora fortress is the highest mountain fortress in Europe. Built between 1765 and 1777, it reinforced the defence of the Prussian state borders in Lower Silesia. The Silberberg fortress system consists of the bastion “Fort Donjon” – the heart of the complex, as well as the surrounding secondary fortresses of “Wysoka Skala”, “Fort Rogowy” and “Fort Ostrog”. The Chochol Wielki and Chochol Maly hills were also fortified. The result was a powerful defence complex that even Napoleon Bonaparte was unable to defeat in 1807. Parts of the old fortress were already being used for tourism at the beginning of the 20th century, including hostels, restaurants and exhibitions. During the Second World War, Silberberg was a prisoner of war camp for Polish officers (Oflag VII b). The historical monument of the Republic of Poland in the first Polish “Fortress Culture Park” since 2004 offers an attractive leisure and cultural programme and is an outstanding example of historical fortification architecture, modern renovation and use.