A Russian Orthodox nun attends an Orthodox Easter mass at the Christ The Saviour Catherdal, in Moscow, Russia, May,1, 2016. Russian President &lt;a gi-track='captionPersonalityLinkClicked' href=/galleries/search?phrase=Vladimir+Putin&amp;family=editorial&amp;specificpeople=154896 ng-click='$event.stopPropagation()'&gt;Vladimir Putin&lt;/a&gt;, 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.