Dorian Hawkmoon, Duke of Köln is one of the fictional characters created by Michael Moorcock in his series of the Eternal Champion books. He is the main character of "The History of the Runestaff" cycle, published 1967–1969.
Dorian Hawkmoon is one of the less "problematic" characters Moorcock ever created a series around. Unlike the anti-hero Elric of Melniboné, or the alienated and tragic Corum, or the sometimes savage Erekosë, Hawkmoon is described as being very much close to an all-around "good guy", despite lacking some subtlety (or perhaps, for this very reason).
Hawkmoon is captured by the evil forces of Granbretan who implant by means of arcane technology (devised by a caste of 'sorcerer-scientists') a sinister black jewel in his skull. He is sent to Kamarg (a future version of the southern French region of Camargue) to perform reconnaissance prior to invasion. The black jewel transmits (and may record) all that Hawkmoon sees to Granbretan's capital, Londra. Temporarily freed from the curse of the jewel by Kamarg's Protector, a grizzled warlord called Count Brass, he falls in love with the Count's daughter, Yisselda, and embarks on a quest to find and implement the will of the Runestaff, a magical item which preserves the Cosmic Balance. During his adventures, he has to collect two more magical items; the Red Amulet held by a mad god somewhere in future Ukraine; and the Sword of the Dawn. Winning many battles in which he is hopelessly outnumbered, but helped by loyal companions, by mysterious allies who arrive in the nick of time, and by dissension, scheming and treachery in the ranks of his foes.
The Runestaff is one of the major artifacts in Moorcock's Multiverse. The Black Sword (whose aspects in Elric's milieu are the soul-stealing swords Stormbringer and Mournblade) is another. The Black Jewel, which manifested itself in the world of Hawkmoon as the Jewel implanted in Hawkmoon's skull, is akin to the Black Sword. Another artifact, the most powerful, is the Cosmic Balance: it powers the Runestaff to produce Order. The Horn of Fate is still another artifact or power. Often artifacts are carried by the Champion Eternal.