As patriarch, he led several synodal delegations to other churches: the Ecumenical Patriarchate (1978), the Orthodox Church in America Romanian Episcopate (1979), the Russian Orthodox Church (1980), the Serbian Orthodox Church (1981), the Church of Sweden (1981), the Geneva headquarters of the World Council of Churches (1981), the Bulgarian Orthodox Church (1982), the Reformed Church in Hungary (1982) and the Church of Greece (1984). In return, he was visited by a number of church leaders, as well as by numerous representatives of other churches and Christian denominations from all over the world.