Veste Oberhaus, Passau

Veste Oberhaus in Passau, Germany, was founded by the medieval bishopric under Prince-Bishop Ulrich II.

The fortress was established in 1219 at the site of an earlier chapel dedicated to St. George, shortly after the bishopric received electoral status in 1217. From its foundation the building served both as a military stronghold and as a residence for the prince-bishops, intended to defend against outside enemies and to deter internal challenges, including efforts by the townspeople to claim free-city privileges.

Work on the fortifications resumed in the mid-13th century, with documented renovations beginning in 1255–56 and continuing as siegecraft changed. Between 1250 and 1482 the fortress withstood five sieges without falling. Two of those assaults, in 1298 and 1367, were launched by the citizens of Passau. Over the late medieval period the complex was reshaped in stages under successive rulers. Major rebuilding campaigns and stylistic changes are recorded under Leonhard von Laiming, Christoph von Schachner, Wiguleus Fröschl von Marzoll, Urban von Trennbach and Johann Philipp von Lamberg, and the site moved from an original Gothic stronghold toward an early Renaissance princely residence and a fortified princely castle. A façade inscription carrying the date 1499 marks one significant phase of renovation.

Religious and punitive uses are recorded in the 16th century. Between 1535 and 1540 numerous Anabaptists were confined in the castle’s dungeon, and the Ausbund hymnal was compiled during that imprisonment period. Some hymn writers died while detained and many who were held there were later executed for their beliefs. The name Ruprecht von Mosham is recorded among those who were imprisoned and died at the fortress.

The modern military and political history of the site includes several surrenders. The fortress was compelled to yield in 1704, again in 1742, and in 1800. Secularisation in 1802 ended rule by the prince-bishops. During the Napoleonic era the fortress was used in the campaign against Austria and was placed under Bavarian authority as a frontier outpost; it surrendered to an Austrian force in 1805. After the Congress of Vienna the surrounding territory came under Bavarian control.

From 1822 and for almost a century the complex served Bavarian authorities as a state prison and a military penal institution, a reputation that generated severe public fear. The City of Passau acquired the site in 1932 and moved municipal collections there the same year. The facility reopened as the Ostmarkmuseum in 1933, and some rooms were converted for official guest use in 1937. During and immediately after the Second World War, United States troops used parts of the complex as a rest center from May 1945 until February 1946, and an auxiliary hospital operated in February 1946. After the hospital closed, the Oberhausmuseum opened on 26 August 1952. Archaeological fieldwork in the 1990s revealed remains of a 17th-century residential tower. In the 1930s a large open-air assembly theatre replaced the forward Baroque works; it was built starting 26 August 1934 and dedicated 22 September 1935, hosted mass events in the late 1930s, and now leaves no visible remains.