The Diocese of Mtskheta and Tbilisi is the united see of the Catholicos-Patriarch of the Church of Georgia. Mtskheta and Tbilisi were originally separate dioceses. The episcopacies of the two dioceses were first united after the union in 1811 of the Church of Georgia with the Church of Russia as the seat of the Exarch of Georgia. Although separated initially following the All-Russian Sobor of 1917, the dioceses were again united in 1920 after the Church of Georgia regained autocephaly.