Klisurski is a monastery of the Bulgarian Orthodox Church located in northwestern Bulgaria. It is the fourth largest monastery in Bulgaria. The complex includes two churches, three residential buildings, a farmyard and a kitchen.
Klisurski Monastery was founded in the 1240 during the Second Bulgarian Empire. It was repeatedly destroyed during the Ottoman rule. In 1862 it was burned down and the monks and pilgrims were killed by a Turkish pasha and his soldiers. The monastery was reconstructed in 1869 and the church was officially consecrated in 1891.
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.