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MOSCOW, RUSSIA - MAY, 1 (RUSSIA OUT) Russian Orthodox Patriarch Kirill (L) attends an Orthodox Easter mass at the Christ The Saviour Catherdal, in Moscow, Russia, May,1, 2016. Russian President Vladimir Putin, Moscow Mayor Sergei Sobyanin, Prime Minister Dmitry Medvedev and his wife Svetlana took part an Orthodox Easter service held by Patriarch Kirill at the biggest Russian Orthodox Cathedral. (Photo by Mikhail Svetlov/Getty Images)

MOSCOW, RUSSIA - MAY, 1 (RUSSIA OUT)  Russian Orthodox Patriarch Kirill (L) attends an Orthodox Easter mass at the Christ The Saviour Catherdal, in Moscow, Russia, May,1, 2016. Russian President Vladimir Putin, Moscow Mayor Sergei Sobyanin, Prime Minister Dmitry Medvedev and his wife Svetlana took part an Orthodox Easter service held by Patriarch Kirill at the biggest Russian Orthodox Cathedral. (Photo by Mikhail Svetlov/Getty Images)