St Stephen of the Abyssinians is a Roman Catholic church located in Vatican City. The church dedicated to Stephen the Protomartyr is the national church of Ethiopia. The liturgy is celebrated according to the Alexandrian rite of the Ethiopian Catholic Church. It is one of the only standing structures in the Vatican to survive the destruction of old St. Peter's basilica, and thus it is the oldest surviving church in Vatican City.
The church was, by tradition, built by Pope Leo I (ca. 400-461). It was rebuilt in 1159 under Pope Alexander III, who also built a monastery for Ethiopian monks next to it.
In 1479, Pope Sixtus IV restored the church and assigned it to the Coptic monks in the city. It was at this time that the name was changed to reflect that it was served by Ethiopians (Abyssinian). It was altered under Pope Gregory XI (1700-1721), and again in 1928.
The façade is in the style of the early 18th century. The 12th century doorway, decorated with the Lamb and the Cross, has been preserved. The church has a single nave with ancient columns along the sides. The most important work of art is a fresco of the Madonna with Child in the Roman style from the 15th century.
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.