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Photo: Klearchos Kapoutsis from Santorini, Greece, CC BY 2.0 via Wikimedia Commons
Partially restored ruins of a 10th-century church with unusual architecture - a round inner chamber (rotunda). Scholars have argued for a long time if it's the same as the Golden Church mentioned in chronicles of that time. As the name suggests, it had a gilded dome and the interior was richly decorated (the surviving decorations are exhibited in the Museum).
The Round Church, also known as the Golden Church or the Church of St John, 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 Simeon I's rule, and was unearthed and first archaeologically examined in 1927–1928.
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An ornate Orthodox church built between 1897 and 1927, as a part of a modern monastery built over the ruins to commemorate the medieval capital. It was nationalised by the Communist regime in the 1940s, and never returned to the Bulgarian Orthodox Church, so it's inactive (and locked up). The church stands closely to the ruins of the inner city wall, and you can appreciate the wall's dimensions by the sections that fell down in a single piece.
Colourful old Orthodox town church. Built 1908-1931, frescoes finished 1951. It's claimed that this is the church with the most depictions of Bulgarian saints and martyrs, over 60. Feast day is 8th of November.