The Frisian stadtholders were endowed with the fiefdom Dietz in present-day Germany. The 'Duke's Castle' (built in the eleventh century) was the main residence of Sophia Hedwig von Braunschweig-Wolfenbütteland and she remained there after the death…

The Frisian stadtholders were obliged to attend the meetings of the States-General at the Binnenhof in The Hague. They spent therefore a large part of the year in The Hague.

They had their own palace, known as the 'Friese Hof' [Frisian Court].…

Map of the battle at Malplaquet, where the French were defeated by the allied forces, on September 11th, 1709. Illustration in: J. Lamigue, Het leven van Zyne Hoogheit Johan Willem Friso, dl. II, p. 142/143.