This article explores the question whether any traces of Calvin’s theological views on church unity can be found in the purpose statements and goals of the World Council of Churches (WCC). Although no direct influence of Calvin’s theology on the work of the WCC can be proved, the structure and content of Calvin’s thought on church unity can be recognised in the statements and work of the WCC. Calvin believed that true church unity is not in the first place a unity of church structures, but one of truth, love, hope and confession. The ecumenical movement is in agreement with Calvin in this regard. The ecumenical movement and the World Council of Churches are products of modern culture. The ecumenical movement could not have developed in a w...