 It gained importance when Emperor Constantine elevated Byzantium to a second capital alongside Rome and named it Constantinople.The see's ecclesiastical status as the second of five patriarchates were developed by the Ecumenical Councils of Constantinople in 381 and Chalcedon in 451.The Turkish government recognizes him as the spiritual leader of the Greek minority in Turkey, and refer to him as the Greek (literally "Rûm") Orthodox patriarch of Fener ().