Cathedral Church of Osnabrück: allegory and calendar. Engraving by J. & J. Klauber, ca. 1764, after J.W. Baumgartner, and letterpress, ca 1799.

The lettering names Prince Frederick as Bishop of Osnabrück and Duke of Brunswick-Lüneburg: he had been appointed to the bishopric at the age of six months. "Frederick, Prince, duke of York and Albany (1763–1827), army officer and bishop of Osnabrück, was the second son of George III and Queen Charlotte. He was born at St James's Palace, London, on 16 August 1763, and on 27 February 1764 was elected to the bishopric of Osnabrück through his father's influence as elector of Hanover. The bishopric, a principality in the Holy Roman empire, alternated between a Catholic prelate and a protestant prince; as the latter, Frederick was never intended to take holy orders." (Oxford dictionary of national biography)