The Roman Wall is the popular but incorrect name for an early Ottoman-era architectural monument in Sofia, the capital of Bulgaria. Part of a 16th or 17th-century Islamic religious building, it now stands in the middle of a small marketplace in the Lozenets neighbourhood.
The Roman Wall is a rectangular structure of straight rows of bricks and stones. It exhibits a characteristic Ottoman construction method of surrounding the large cut stones with sets of bricks. The wall is situated with an east–west orientation and features two windows, with a mihrab niche in between. A notched brick cornice decorates the top of the wall.
The Roman Wall was built in the 16th or 17th century, the time of the Ottoman rule of Bulgaria. The wall's exact purpose is unclear, though it is agreed that it performed an Islamic religious function. It may either be the preserved part of an eminent Ottoman Turk's tomb, or it may have formed part of a namazgâh, an open-air religious structure where the imam would perform a prayer for those embarking on the Hajj.
In the late 19th century, after the reestablishment of the Principality of Bulgaria in 1878, the Old Wall remained as a lone marker in the abandoned Turkish graveyard. In 1957, the wall underwent a reconstruction and was enlisted as a monument of culture.
References:Duino Castle was built by the Wallsee family in 1389 on the cliffs overlooking the Gulf of Trieste. It replaced an older castle from the 11th century. Over time, the Wallsee family disappeared and the castle, after having been used as a prison, became the residence of the Luogar and Hofer.
At the end of the 19th century it became the property of Prince Alexander von Thurn und Taxis from the Czech branch of the House of Thurn and Taxis. It remains with the family to this day with his great-grandson Prince Carlo Alessandro della Torre e Tasso, Duke of Castel Duino the current owner. The castle has been opened to the public as a museum and park.