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:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.