The Church of Christ Pantocrator is a medieval Eastern Orthodox church in Nesebar, on the Black Sea coast. It is usually dated to the late 13th or early 14th century. The church, today an art gallery, survives largely intact and is among Bulgaria's best preserved churches of the Middle Ages.
The best-known feature of the Church of Christ Pantocrator is the rich and colourful decoration of its exterior walls. The most lavishly decorated part of the church is the east side with the apse, and as a whole all sides of the church exhibit different ornamentation. Interchanging strips of three or four rows of bricks and carved stones, which create an optical pattern, are the most basic type of decoration used.
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.