The Catholic-Orthodox Joint Declaration of 1965 was read out on 7 December 1965 simultaneously at a public meeting of the Second Vatican Council in Rome and at a special ceremony in Istanbul. It addressed an exchange of excommunications between prominent ecclesiastics in the Roman see and the Patriarchate of Constantinople, commonly known as the Great Schism of 1054. It did not end the schism but showed a desire for greater reconciliation between the two churches, represented by Pope Paul VI and Ecumenical Patriarch Athenagoras I.

See also: anathema