Name Image Area (m²) Gross volume (m³) Capacity Built City Country Jurisdiction Notes Interior Exterior People's Salvation Cathedral 8,400 m² [1] [2] [3] [4] ca. 13,670 m²[1] [4] [5] [6] 478,857 m³[4] 7,000 [a] [7] 2010–present Bucharest Romania Patriarchate of Romania Along with the largest volume and interior area, 126,1 m high and 120 m long, it is the tallest and longest Orthodox church building in the world.[4] Saint Isaac's Cathedral [b] 4,000 m² [8] 7,418 m²[9] 260,000 m³12,000 [10] 1818-1858, Museum 1931 Partly reopened for services 1992 Saint Petersburg Russia State Russian Museum With 105 m length and 93 m width it is the Orthodox church building that has the greatest groundfloor extent. Hagia Sophia 7,960[citation needed 255,800 m³ [11] 532–537 Istanbul Turkey Ecumenical Patriarchate 537-1453converted to mosque Church of Saint Sava 3,650 m² [c] [12] 4,830 m²[13] 170,000 m³ [12] 6,000−10,000 [d] [14] [12] 1935–2004 Belgrade Serbia Serbian Patriarchate It is the tallest (78 m), longest (91 m), widest (81 m) and largest (by area and volume) church building in the Balkans. Cathedral of Christ the Saviour 3,990 m² [15] [16] [e] 6,829.3 m² [15] [17] 101,992 m³ [15] 10,000 [18] 1839–1883, Demolished 1931, Rebuilt 1994–2000 Moscow Russia Moscow Patriarchate The church building has an underground area of 28,000 m², it contains the hall of the church council with 1,250 places, the hall of the synod meetings, refectory, and technical installations[19] Kazan Cathedral 4,000 m²[citation needed 6,000 [citation needed 1811 Saint Petersburg Russia Moscow Patriarchate Trinity Izmailovsky Cathedral 3,500 m²[20] 3,000 [20] 1835 Saint Petersburg Russia Moscow Patriarchate Holy Trinity Cathedral of Tbilisi (Tsminda Sameba Cathedral)3,000 m²[citation needed 137,000 m³[citation needed 10,000 [citation needed 1995-2004 Tbilisi Georgia Patriarchate of Georgia Novocherkassk Ascension Cathedral 2,900 m²[citation needed 135,000 m³[21] 5,000 [citation needed 1904 Novocherkassk Russia Moscow Patriarchate Alexander Nevsky Cathedral 3,170 m²[22] 86,000 m³[23] 5,000 [24] 1882-1912 Sofia Bulgaria Patriarchate of Bulgaria Transfiguration Cathedral 3,100 m²[citation needed 9,000 [25] 1837, rebuilt 2003 Odesa Ukraine Moscow Patriarchate Smolny Convent 3,000 m²[citation needed 6,000 [26] 1764 Saint Petersburg Russia Moscow Patriarchate Kronstadt Naval Cathedral 3,000 m²[citation needed 5,000 [citation needed 1913 Kronstadt Russia Moscow Patriarchate Church of Saint Panteleimon 2,400 m²[citation needed 5,000 [citation needed 1930 Athens Greece Greek Orthodox Church Holy Trinity Cathedral 2,100 m²[citation needed 5,000 [citation needed 1990–present Baia Mare Romania Patriarchate of Romania Annunciation Cathedral 2,000 m²[citation needed 5,000 [27] 1901 Kharkiv Ukraine Ukrainian Orthodox Church Saint Andrew of Patras 2,600 m²[28] 7,000 [28] 1908–1974[29] Patras Greece Greek Orthodox Church Cathedral of the Lord's Ascension 1,706 m²[30] 5,000 [citation needed 2017 Bacău Romania Patriarchate of Romania Resurrection Cathedral 1,660 m²[citation needed 5,000[citation needed 2014 Tirana Albania Albanian Orthodox Church Timișoara Orthodox Cathedral 1,542 m²[31] 50,000 m³[31] 5,000 [32] 1940 Timișoara Romania Patriarchate of Romania With 91 m height It is the second tallest church building in Romania. Alexander Nevsky Cathedral 1,450 m²[citation needed 4,000 [citation needed 1900 Tallinn Estonia Moscow Patriarchate Agios Minas Cathedral 1,350 m²[33] 3,000 [citation needed 1895 Heraklion Greece Greek Orthodox Church Saint Mark's Church 1,150 m²[citation needed 3,000 [citation needed 1931–1940 Belgrade Serbia Serbian Patriarchate Saints Boris and Gleb Cathedral 1,100 m²[citation needed 3,000 [citation needed 1905 Daugavpils Latvia Moscow Patriarchate Poti Cathedral 1,000 m²[citation needed 3,000 [citation needed 1906 Poti Georgia Patriarchate of Georgia Uspenski Cathedral 1,000 m²[citation needed 1868 Helsinki Finland Finnish Orthodox Church St. Michael's Cathedral 12,000 [citation needed 2000 Cherkasy Ukraine Ukrainian Orthodox Church Church of the Holy Sepulchre 10,000 [34] 326 Jerusalem Israel /Palestine Patriarchate of Jerusalem Transfiguration Cathedral of Ugresha Monastery 7,000 [citation needed 1894 Dzerzhinsky, Moscow Oblast Russia Moscow Patriarchate Church of the Nativity of Christ 5,000 [35] 1857 Kyshtym Russia Moscow Patriarchate St. Nicholas Naval Cathedral 5,000 [citation needed 1753 Saint Petersburg Russia Moscow Patriarchate Sophia Cathedral 5,000 [citation needed 1788 Saint Petersburg Russia Moscow Patriarchate Uzhhorod Orthodox Cathedral 5,000 [citation needed 1990 Uzhhorod Ukraine Ukrainian Orthodox Church Iași Metropolitan Cathedral 3,000 [36] 1887 Iași Romania Patriarchate of Romania Church of Holy Transfiguration 1873–1878 Pančevo Serbia Serbian Patriarchate .jpg)
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