Ecumenical Patriarch Bartholomeos I of Constantinople has left Russia after a 10-day visit praised by his hosts for strengthening relations with the Russian Orthodox Church.
Orthodox church leaders from Russia and Georgia called for peace while their political counterparts lobbed charges of aggression for the anniversary of the South Ossetia war.
While Protestant, Anglican and Catholic Christians have just finished celebrating the major Easter festival and are looking towards Pentecost, for some the season is still heading towards its Sunday climax.
Orthodox Ecumenical Patriarch Bartholomew had a private meeting with US President Barack Obama in the run up to Easter, touching on environmental concerns and issues about the future of Turkey.
Lebanon-based Armenian Orthodox leader Aram I has at a Vatican meeting with Pope Benedict XVI proposed that the world's churches set a common date for Easter, when Christians celebrate the resurrection of Jesus.
Orthodox leader Bartholomew I of Constantinople has become the first ever Ecumenical Patriarch to speak to the General Assembly of the Synod of Catholic Bishops in Rome, following years of tension between the churches.
Ecumenical Patriarch Bartholomeos, seen by many of the world's Orthodox Christians as their spiritual leader, has said he backs the bid by Turkey to join the European Union if the Muslim-majority nation meets human rights standards.
Bartholomeos I, the Ecumenical Patriarch of Constantinople, has joined the Dalai Lama as one of two international religious figures named in the "Time 100" list, the people deemed by Time magazine to be the world's most influential persons.
The French cleric who heads the main grouping of Anglican, Orthodox and Protestant Christian denominations in Europe has proposed the creation of a Council of European Churches that would also include the Roman Catholic Church.
Churches should be prepared to confront their differences honestly and to examine them in the light scripture, Orthodox Ecumenical Patriarch Bartholomeos I told a service to celebrate 60 years since the World Council of Churches was founded.