Frederick Francis I ruled over the German state of Mecklenburg-Schwerin, first as duke, and then as grand duke. Wikipedia
Born: December 10, 1756, Schwerin, Germany
Died: February 1, 1837 (age 80 years), Ludwigslust, Germany
Spouse: Princess Louise of Saxe-Gotha-Altenburg (m. 1775–1808)