Sv Georgi Church, Sofia, Bulgaria by Zbigniew

The Church of St George (Ротонда „Свети Георги“ or Rotonda "Sveti Georgi") is an Early Christian red brick rotunda that is considered the oldest building in Sofia, the capital of Bulgaria. The rotunda has a diameter of 9.5m and is about 14m high. It's brick walls are an impressive 1.40m thick. The building is situated amid remains of the ancient town of Serdica.

Built by the Romans in the 4th century CE, it is mainly famous for the 12th-14th century frescoes inside the central dome. Three layers of frescoes have been discovered, the earliest dating back to the 10th century. Magnificent frescoes of 22 prophets over 2 metres tall crown the dome.

The original function of the rotunda is still debated. Some say it was built as a bath (or kaldarium), others argue that since it was located in the centre of 2nd century AD Roman public buildings, it likely had a religious and ceremonial function. Emperor Constantine the Great turned the Rotunda into a Christian temple, which surived until the invasion of Attila's Huns, when it was almost completely destroyed. It was reconstructed during the reign of Emperor Justinian. More at heritage-key.com/category/tags/st-george 43 hand-held shots, Pentax K10D