During the High Middle Ages a fortified church with a ring wall and perhaps a tower was built near the current Steinsberg Castle. By the end of the 12th century, these fortifications were demolished and a new castle was built above formerly fortified plateau and the Church of St. Lazius. It was probably built for a local noble family. In 1209 Albert von Frickingen sold all his estates and villages as well as the castle above Ardez to the Bishop of Chur. Count Albert von Tirol also had a claim on the lands, but in 1228 relinquished his claim to the Bishop of Chur. The castle became the center of the ecclesiastical estates in the area. In 1348 the Bishop pledgedthe castle and lands to the Planta family for a loan of 150 Marks. In 1359, the Bishop again pledged the castle to the Lords of Katzenstein for 700 Gulden. In 1411 it was pledged to Georg Scheck. Despite attempts from the Bishop to regain ownership of the castle, the Scheck family retained it until 1502.
In 1499, during the Swabian War, the castle was captured by imperial troops on 25 March. They burned the castle and the current owner Balthasar Scheck was taken to Merano and executed. In 1502 the heavily damaged castle was pledged to Hans von Planta. He and his son spent the remainder of the 16th century trying to get the Bishop of Chur to pay interest owed on the loan. At some point during that century, they abandoned the ruined castle. As the Three Leagues grew in power, they repeatedly denied the Bishop the right to appoint a vogt over Steinsberg. The nearby church was abandoned during the Protestant Reformation. In 1861 Emanuel von Planta-Wildenberg purchased the ruins and surrounding lands from the Bishop for 1000 Gulden. The ruins were repaired in 1964 and 1985.
The top of the hill has about 100 by 100 meters of space for buildings with steep sides all around. The castle occupies the highest point on the hill. Its four story keep was about 6.5 by 8.5 meters (21 ft × 28 ft) in size. The style of the stone work changes above the second story, indicating that it was either added later or repaired. The high entrance was to the south on the second floor. The upper stories have window seats from the 14th century and were either added then, or they were part of the new construction or repair. A residential wing was built east of the tower, against the ring wall. The castle was probably encircled by the ring wall, though only traces remain.
The ruins of the Romanesque church of St. Luzius are north of the castle. Unusually, the nave of this church runs north and south.References:
Hluboká Castle (Schloss Frauenberg) is considered one of the most beautiful castles in the Czech Republic. In the second half of the 13th century, a Gothic castle was built at the site. During its history, the castle was rebuilt several times. It was first expanded during the Renaissance period, then rebuilt into a Baroque castle at the order of Adam Franz von Schwarzenberg in the beginning of the 18th century. It reached its current appearance during the 19th century, when Johann Adolf II von Schwarzenberg ordered the reconstruction of the castle in the romantic style of England's Windsor Castle.
The Schwarzenbergs lived in Hluboká until the end of 1939, when the last owner (Adolph Schwarzenberg) emigrated overseas to escape from the Nazis. The Schwarzenbergs lost all of their Czech property through a special legislative Act, the Lex Schwarzenberg, in 1947.
The original royal castle of Přemysl Otakar II from the second half of the 13th century was rebuilt at the end of the 16th century by the Lords of Hradec. It received its present appearance under Count Jan Adam of Schwarzenberg. According to the English Windsor example, architects Franz Beer and F. Deworetzky built a Romantic Neo-Gothic chateau, surrounded by a 1.9 square kilometres English park here in the years 1841 to 1871. In 1940, the castle was seized from the last owner, Adolph Schwarzenberg by the Gestapo and confiscated by the government of Czechoslovakia after the end of World War II. The castle is open to public. There is a winter garden and riding-hall where the Southern Bohemian gallery exhibitions have been housed since 1956.