St. George's Church is one of the oldest buildings in Sofia, Bulgaria, dating back to the 4th century. It is a small, red-brick structure known for its unique round shape and beautiful frescoes. The church is located in the heart of the city, surrounded by modern buildings, making it a fascinating historical landmark. The church has served various purposes throughout its history, including a mosque during the Ottoman period. Today, it is a popular tourist attraction and a site for religious ceremonies, showcasing the rich cultural heritage of Bulgaria and the significance of Eastern Orthodox Christianity.