The Patriarchal Cathedral of the Holy Ascension is a former Eastern Orthodox cathedral in the city of Veliko Tarnovo, in north central Bulgaria. Located on top of the fortified Tsarevets hill in the former capital of the Second Bulgarian Empire, the cathedral was the seat of the Bulgarian patriarch from its construction in the 11th–12th century to its destruction in 1393.
The current building of the Patriarchal Cathedral is considered by scholars to have been built in two stages. The first stage of construction was carried out in the late 11th century or the 12th century. The cathedral was initially built as a monastery church in the middle of a monastery compound, though in the early 12th century it was already the seat of the Bulgarian patriarch. The compound suffered large-scale damage caused by a fire, which necessitated the church's reconstruction in middle of the 14th century. Besides repair and reinforcement efforts, work on the church in the 14th century also included the construction of the exonarthex and the bell tower.
The Patriarchal Cathedral was destroyed after the Ottomans captured the Bulgarian capital after their Siege of Tarnovo on 17 July 1393. Reconstructed in the 1970s and 1980s, it follows a cross-domed plan with a bell tower and a triple apse. Richly decorated on both the exterior and interior, its internal walls now feature modern frescoes, the presence of which has meant that it has not been reconsecrated. Though not active as a Christian place of worship, it has been open for visitors since 1985.
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.