Peace of Passau
As a result, on 2 November 1549, Eric II placed Anton Corvinus and Walter Hoiker in custody in Calenberg Fortress for contempt to force them and the other clergy to accept the Interim. The prisoners were well cared for, could receive and reply to letters and talk to visitors through an open window. After the Peace of Passau, when the Emperor declared the Interim invalid and Eric II had fallen out of favour with him, the two prisoners were released on 21 October 1552.