Saint Nicolas and Saint Wenceslas Church in Cieszyn is a Romanesque rotunda to serve the role of a castle chapel and a stronghold church.
The rotunda was erected within the walls of the castellan stronghold at the top of Castle Mount (built in the 10th century and the first half of the 11th century). The first reference to the rotunda comes from 1223, where it was described as St. Nicolas Chapel, obliged to pay a tithe to Norbertine’s sisters in Rybnik. The end of the 13th century and the entire 14th century was related to a reconstruction of the castle and replacement of wood by bricks. The Romanesque rotunda was adapted to the Gothic castle: the level of the floor was raised by two meters, Romanesque windows in the apse were walled up and bigger, Gothic ones were created.
At the time of the conversion of the lower castle in 1838-40, the Romanesque walls of the temple were ringed by a brick wall. New and bigger windows were walled out and a new, tin helmet was put up. The level of the interior nave and the exterior area was raised (the building was almost halfway up rimmed by soil). The Romanesque chapel received a classical division of the façade adjusted to the style of the castle. The design of a romantic pavilion was created by Joseph Koernhausel. The interior of the Rotunda was decorated by a neo-gothic wooden altar and a picture of Saint Wenceslas.
The Rotunda of Cieszyn as one of the oldest monuments of Polish architecture is depicted on the current Polish 20 PLN banknote.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.