Gottorf Castle
On 29 August 1559 he was employed by Duke Hans the Elder in Haderslev where he stayed until his death. In 1559-60 he directed the extension of Hansborg with two new wings and a tower. During Duke Hans' last years he was also responsible for the reconstruction and fortification of Tønderhus. In 1591 he worked on Gottorf Castle, where he is credited for the gables of the northern wing.