 In 1733, he went to Kassel at the invitation of Landgrave William VIII, for whom he created several large portraits.His wife died in 1735 and, the following year, he moved to Hannover then, in 1737, on to Potsdam and Berlin, where he painted for the Prussian Royal Family.He also worked in Wolfenbüttel and Braunschweig from 1738 to 1739.