epa10575251 Russian President Vladimir Putin attends the Orthodox Easter holiday service at the Christ the Saviour Cathedral in Moscow, Russia, early 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/PAVEL BEDNYAKOVSPUTNIK / KREMLIN POOL / POOL MANDATORY CREDIT