Gregory VII of Constantinople

Gregorios Zervoudakis was born on 21 September 1850 in Stavri, a village in the Apollonia district of Sifnos. He entered the Theological School of Halki, the principal seminary of the Ecumenical Patriarchate, and graduated in 1882 after submitting a thesis on the authenticity of the Four Gospels.

His early church service took him to the Diocese of Rhodes, where he served as deacon and as chancellor (protosygelos) before his elevation to the episcopate.

Gregory VII advanced steadily through the ranks of the Orthodox Church in Asia Minor and Thrace. He was elected bishop of Myreo in 1887, metropolitan of Serres in 1892, metropolitan of Kyzikos in 1909, and metropolitan of Chalcedon in 1913.

During the Asia Minor campaign, when the Ecumenical Patriarchate severed relations with the Ottoman government, Gregory disagreed with the decision. He resigned as president of the National Joint Council and from the Holy Synod, retiring to his metropolis in Chalcedon — a choice that later helped his candidacy for the patriarchal throne.

After Patriarch Meletius IV resigned in September 1923, the Synod convened for the first patriarchal election following the Treaty of Lausanne. The Turkish government required that the elected candidate hold Turkish citizenship. On 6 December 1923, the bishops in Constantinople chose Gregory VII, whose distance from secular politics and relatively good relations with the Turkish authorities made him an acceptable figure. He was enthroned on 13 December; his election was challenged by Papa Eftim of the so-called Turkish Orthodox Church until it was recognized by the government of Kemal Atatürk.

During his brief patriarchate, Gregory introduced the revised Julian (New Style) calendar throughout the Patriarchate. On 13 November 1924 he issued the Tomos of 1924, granting autocephaly to the Church of Poland and restoring the independence of the Kievan Metropolitanate. He also recognized the autocephaly of the Polish Orthodox Church, established new metropolitanates (including those of the Princes' Islands, Central Europe, and Australia), and worked to limit the expulsion of clergy under the population exchange agreed between Greece and Turkey.

Gregory died suddenly of a massive heart attack on 17 November 1924, after complications from gallstones and obstructive jaundice. He was succeeded by Constantine VI.

Gregory VII's patriarchate lasted only eleven months, yet it left a lasting mark. The calendar reform he introduced remains one of the defining administrative acts of the interwar Ecumenical Patriarchate, and the Tomos of 1924 reshaped the structure of Orthodox Christianity in Poland and Ukraine. Historians of the period note his pragmatic approach to relations with the new Turkish republic — a balancing act between the spiritual leadership of millions of Orthodox Christians and the political realities of a minority church under a secular nationalist state.