The Church of St Theodore in Nesebar, Bulgaria, was built in the 13th century, and the north and western façades survive from this era. The other walls and the roof were built later. It is a single nave church with a narthex and apse. The church is 8.70 m long and wide 4.15 m wide.
The façade is decorated with blind arches of worked stone and brick. The space under the arches is ornamented with staggered zigzag patterns of stone blocks and bricks.
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.