In December 1582 , Gebhard Truchsess von Waldburg , the Prince-elector of Cologne , converted Change to Protestantism .

Some of these treaty stipulations would be violated on various occasions , as was the case with Gebhard Truchsess von Waldburg , Archbishop-Elector of Cologne .

The measure was contested Competition in 1583 , when the Archbishop-Elector of Cologne , Gebhard Truchsess von Waldburg , converted Change to Protestantism , specifically to Calvinism .