Frederick I of Prussia (born 1657)

Frederick I, of the Hohenzollern dynasty, was Elector of Brandenburg (1688–1713) and Duke of Prussia in personal union (Brandenburg–Prussia). The latter function he upgraded to royalty, becoming the first King in Prussia (1701–1713). From 1707 he was in personal union with the sovereign prince of the Principality of Neuchâtel.

February 25 is the 56th day of the year in the Gregorian calendar; 309 days remain until the end of the year.