Zweder van Culemborg

In order to end the conflict, pope Martin V nominated his own favourite, Raban von Helmstatt to the bishopric in 1422.

But Raban declined the nomination, after which the pope appointed Zweder on 6 February 1425.

As a result Rudolf was excommunicated by the pope, but he nonetheless managed to maintain himself, even though Zweder was initially supported by the duke of Guelders and Philip the Good, who was also count of Holland.

But Rudolf was able to sign treaties with neighbouring rulers, after which pope Eugene IV, Martin V's successor, appointed Zweder to the titular bishopric of Caesarea Maritima and recognised Rudolf as bishop of Utrecht on 10 December 1432.

This information is partly based on De Katholieke Encyclopaedie (Amsterdam, 1938) This article about a Catholic bishop from Europe is a stub.