Frederick I Barbarossa: Did you mean...?

Frederick Douglass (l. c. 1818-1895), abolitionist and author. Photograph by George Kendall Warren, 1879. National Archives and Records Administration, Washington, D.C.

Gold coin of Holy Roman Emperor Frederick II, minted in Sicily between 1211-1250 CE. Weighs 5.2 grammes and measures 20 mm (British Museum, London)

Gold coin of Holy Roman Emperor Frederick II (l. 1194-1250).

A manuscript depicting Frederick II (l. 1194-1250 CE) being excommunicated by Pope Innocent IV.

Prince Frederick, Duke of York and Albany (1763-1827), second son of King George III of the United Kingdom. He led the British forces during the Flanders Campaign of 1792-1795 during the French Revolutionary Wars and later served as commander-in-chief...

King Frederick William III of Prussia (r. 1797-1840), oil on canvas portrait by an unknown artist, between 1830-1840. Museum of Prussia, Minden, Germany.

Portrait of Frederick II (l. 1194-1250 CE) from the "Manfred manuscript" (Biblioteca Vaticana, Pal. lat 1071) of De arte venandi cum avibus, late 13th century CE.

Frederick Benteen (l. 1834-1898) in his later years. He served with Lt. Colonel George Armstrong Custer and was present at the Washita Massacre (1868) and the Battle of the Little Bighorn (1876).

Frederick III of Sicily (r. 1295-1337 CE) 14th-century CE mosaic in the Messina Cathedral.

The Fifth Crusade (1217-1221 CE) was called by Pope Innocent III (r. 1198-1216 CE) with the objective, like previous crusades, of recapturing Jerusalem from Muslim control; only this time the strategy was to weaken the enemy by first attacking...