Hatto

, or Atto Vercellensis, bishop of Vercelli, in Italy, of a noble family, was born in Piedmont iri the beginning of the tenth century, and was esteemed a learned divine and canonist. He was promoted to the bishopric of Vercelli in the year 945, and by knowledge and amiable manners proved himself worthy of this rank, | It is not mentioned when he died. His works are, I. “Libeilus de pressuris Ecclesiasticis,” in three parts, inserted in D'Achery’s “Spicilegium.” This treatise on the sufferings and grievances of the church, Mosheim says, shews in their true colours the spirit and complexion of the times. 2. “Epistolae.” 3. “Canones statutaque Vercellensis Ecclesiae,” both in the same collection. In the Vatican, and among the archives of Vercelli, are many other productions of this author, all of which were collected by Baronzio, and published as the “Complete works of Hatto,” in. 1768, 2 vols. fol. ¹