The Saint Sophia Cathedral in Kyiv, Ukraine, Thursday, Dec. 21, 2023. A UNESCO World Heritage site, the gold-domed St. Sophia Cathedral, located in the heart of Kyiv, was built in the 11th century and designed to rival the Hagia Sophia in Istanbul. The monument to Byzantine art contains the biggest collection of mosaics and frescoes from that period, and is surrounded by monastic buildings dating back to the 17th century. (AP Photo/Evgeniy Maloletka)