The Church of St George is dated to the late 10th or early 11th century based on its architectural appearance and mural paintings, which makes it the oldest preserved church in the city. It is located in Kyustendil's southwestern part, in the former village of Kolusha, which in 1939 was merged into the city. There is a theory that
Bulgarian emperor Michael Shishman was buried in the Church of St George after he perished in the
Battle of Velbazhd in 1330. However, scholar Bistra Nikolova entirely dismisses this theory as an "erroneous reference in [Bulgarian history] literature". Despite being located outside Kyustendil at the time, up until the construction of the city's main
Bulgarian National Revival-style church in 1816, the Church of St George served as Kyustendil's
cathedral. The church suffered some severe damage during the 19th century, the time of the
Ottoman rule of Bulgaria; it was mostly destroyed, leaving only the foundations of the arches. It was reconstructed in 1878–1880, just after the establishment of the
Principality of Bulgaria, ==Architecture and decoration==