High Quality Content by WIKIPEDIA articles! The Round Church (Bulgarian: Кръгла църква, Kragla tsarkva), also known as the Golden Church (Златна църква, Zlatna tsarkva) or the Church of St John (църква „Свети Йоан“, tsarkva „Sveti Yoan“), is a large partially preserved early medieval Eastern Orthodox church. It lies in Preslav, the former capital of the First Bulgarian Empire, today a town in northeastern Bulgaria. The church dates to the early 10th century, the time of Tsar Simeon I`s rule and was unearthed and first archaeologically examined in 1927–1928.