Patriarch Bartholomew, born Dimitrios Archontonis in 1940, is the 270th Ecumenical Patriarch of the Eastern Orthodox Church. He has held this position since 1991 and is based in Istanbul, Turkey. As a prominent religious leader, he is often referred to as the "Green Patriarch" due to his advocacy for environmental issues and sustainability. Bartholomew plays a significant role in promoting dialogue among different Christian denominations and other religions. He has worked to strengthen the unity of the Orthodox Church and has been involved in various interfaith initiatives, emphasizing peace and cooperation among diverse faith communities.