Hatto of Milan

ATTONE of MILANO. - Cardinal of the title of S. Marco and archbishop of Milano in the second half of the 11th century, he was obliged to abandon his see because of the opposition of the imperial party. In Rome, where he spent the rest of his life, he compiled, for the use of the clerics of his title, a collection of brief juridical fragments, drawn not only from the pseudo-Isidorian and Dionysian collections, but also from the epistles of St. Gregory the Great, and dealing especially with the rights of the Roman Pontiff, the rights and duties of clerics, the administration of the Sacraments, censures, and ecclesiastical judgments. It is commonly called the Capitolare, but was entitled by its author Defloratio canonum. It consists of 500 chapters and was compiled under the pontificate of Alessandro II or at the beginning of the pontificate of Gregorio VII.