Ceiling of the Sioni Cathedral, a Georgian Orthodox cathedral in Tbilisi, capital of Georgia. The cathedral is situated in historic Sionis Kucha (Sioni Street) in downtown Tbilisi. It was initially built in the 6th and 7th centuries. Since then, it has been destroyed by foreign invaders and reconstructed several times. The current church is based on a 13th-century version with some changes from the 17th to 19th centuries. The Sioni Cathedral was the main Georgian Orthodox Cathedral and the seat of Catholicos-Patriarch of All Georgia until the Holy Trinity Cathedral was consecrated in 2004.. Learn more.