Gottorf Castle
After the conclusion of the peace negotiations in Münster, van Hulle followed the delegates to Nuremberg where the debriefings took place in 1649. His patron Frederick Henry died the same year. He travelled to Kassel in 1650 and was active at the Dresden court in 1651. He probably also worked at other courts in the region. From 1652 he was active in Vienna where he entered the service of Emperor Ferdinand III. The emperor gave him a peerage on 27 August 1652. The Emperor sent him to Gottorf Castle in 1653 to paint a portrait of Frederick III, Duke of Holstein-Gottorp. He then returned to Vienna.