Alberic I., a ruler of Rome in the early part of the 10th century. He was originally a Lombard nobleman, but obtained through the aid of Berengarius of Friuli the marquisate of Camerino, and by his marriage with Marozia, the daughter of the notorious Roman Theodora, the temporal authority over Rome. He joined Pope John X. in the expulsion of the Saracens. He also ruled the duchy of Spoleto. He was, however, banished from Rome, and finally murdered in 925. His widow wedded Guido of Tuscany, and after his death Hugo of Provence, king of Italy, who was afterward expelled by her son, Alberic II., who reigned over Rome until his death in 954.