The Holy Forty Martyrs Church is a medieval Eastern Orthodox church constructed in 1230 in the town of Veliko Tarnovo in Bulgaria, the former capital of the Second Bulgarian Empire. It was built and painted on the order of Bulgarian tsar Ivan Asen II in honour of his important victory near Klokotnitsa over the Despotate of Epirus in 1230. The name of the church came naturally as the battle took place on the day of the feast of Holy Forty Martyrs of Sebaste. A royal church during the reign of Ivan Asen II, it was the main church of the Great Lavra monastery at the foot of Tsarevets on the left bank of the Yantra River.
In the first years of Ottoman rule, the church preserved its Christian character, possibly until the first half of the 18th century. It was then converted to a mosque, with the mural paintings, the icons and the iconostasis being destroyed and alterations being made to the structure itself in 1853. Only a limited number of paintings are preserved, primarily from the northern half of the narthex's west side.
The Holy Forty Martyrs Church, an elongated six-columned basilica, has three semicircular apses and a narrow narthex from the west. Another building was added later to the west side of the church. The church interior was covered with mural painting probably in 1230. On the western addition some of the outer decoration survived revealing the traditional arches and coloured small ceramic plates inserted into the wall. It is not clear if the church has frescoes painted on the outer walls.
The church contains some of the Bulgarian Empire's most significant historical records, including Omurtag's Column, Asen's Column and the Border Column from Rodosto from the rule of Khan Krum. The columns of Khan Omurtag and Khan Krum are written in the Greek language. The inscription of the column of Krum 'Fortress of Rodostro' has been turned upside down. The inscription of Omurtag is about the building of a new glorious palace on the Danube river, but its location is unknown. The second part of the inscription is a legacy for following generations to remember the deeds of Omurtag. These columns were placed in the church by Ivan Asen II as a tribute to his mighty ancestors.
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.