The rotunda church of St George is considered to be the oldest building in Sofia, dating to the 4th century, and is situated amid the remains of the ancient Roman town of Serdica. St George Rotunda is famous for its exquisite architecture and layers of medieval frescoes that were discovered under a covering of plaster. The magnificent dome is protected by UNESCO and the church functions at present as a museum.
Address: 5 Ploshtad Sveta Nedelya; Telephone: (0)2 981 6541; Opening time: Daily except Friday 8am to 12.30pm and 3.30pm to 7.30pm; Admission: Free