Conrad of Thüringia, a proud, quick, fiery-tempered magnate, seized the archbishop of Mainz once, swung him round, and threatened to cut him in two; stormed, plundered, and set fire to an imperial free town for an affront offered him; but admonished of his sins became penitent, and reconciled himself by monastic vow to the Pope and mankind about 1234.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Conrad III. * Conradin the Boy