Tsarevets is a medieval stronghold located on a hill with the same name in Veliko Tarnovo in northern Bulgaria. It served as the Second Bulgarian Empire's primary fortress and strongest bulwark between 1185 and 1393, housing the royal and the patriarchal palaces, and it is also a popular tourist attraction.
The hill has evidence of human presence from the 2nd millennium BC and was settled in the 4th century. After the Bulgarian Rebellion, it became the empire's key fortress, comparable to Rome and Constantinople. In 1393, it fell to Ottoman forces, marking the Bulgarian Empire's demise.
The fortress has three entrances, with a central complex featuring a throne hall, castle church, and king's chamber. Restoration started in 1930 and was completed in 1981. The stronghold, surrounded by thick walls and three gates, housed kings Petar, Asen, Kaloyan, and Ivan Asen II. The palace complex included a fortified wall, towers, and entrances. The patriarchate, at the hill's top, has the Cathedral of the Ascension of the Lord.
Baldwin's Tower, a modern reconstruction in the southeastern part, commemorates Latin Emperor Baldwin I's death. During the Middle Ages, the hill had residential buildings, workshops, churches, and monasteries. Archaeologists found 400 buildings, 22 churches, and 4 monasteries. Execution Rock, where traitors were pushed into the Yantra River, is also located here; Patriarch Joachim was executed in 1300.
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.