The Pantheon of National Revival Heroes is a Bulgarian national monument and an ossuary, located in the city of Ruse. The remains of 39 famous Bulgarians are interred there, including: Lyuben Karavelov, Zahari Stoyanov, Stefan Karadzha, Panayot Hitov, Tonka Obretenova, Nikola Obretenov, Panayot Volov, Angel Kanchev, and others; 453 other participants in Botev's detachment, the Chervena Voda detachment, in the April uprising, and other revolutionaries have been honored by inscription of their names in the interior. An eternal fire burns in the middle under the gold-plated dome.
In order to build the Pantheon in 1977, the 'All Saints' church in the old Rousse cemetery was demolished. The new building was opened to visitors on 28 February 1978. After a public discussion in 2001, the Patheon was 'Christianised' by placing a cross on top of its dome. The St Paisius of Hilendar chapel, as well as a museum exposition, were founded at that time.
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.