epa10575270 A handout photo made available by the Moscow and All Russia Partiarch Press Service shows Russian President Vladimir Putin (C) congratulating Patriarch of Moscow and All Russia Kirill (R) during the Orthodox Easter holiday service at the Christ the Saviour Cathedral in Moscow, Russia, 16 April 2023. Orthodox Christian believers mark the Holy Week of Easter in celebration of the crucifixion and resurrection of Jesus Christ. The Greek Orthodox world celebrates Easter Day according to the old Julian calendar.  EPA/SERGEY VAGANOV / HANDOUT  HANDOUT EDITORIAL USE ONLY/NO SALES