On 13 April 1068, Pope Alexander II issued a bull, granted the pallium to Archbishop Arnaldus of Acerenza and confirming him in the archbishopric of Acerenza, including all of the parishes and towns belonging to it, including Tricarico, Montepiloso, Gravina, and Materia. Matera, it seems, was not an independent town or bishopric yet.Kehr, Italia pontificia IX, p. 456, no. 6: "omnibus parochiis suis, civitatibus quoque soil. Venusio, Montemilone, Potentia, Tulbia, Tricarico, Montepiloso, Gravina, Materia, Oblano, Turri, Tursico, Latiniano, s. Quiriaco, Uriolo, exceptis his, quae ad dominicatum apost. sedis iure retinet, Montemmurrum et Armentum, quae Acherontinae eccl. recenter transierunt." Cappelletti XX, p. 433: "Alessandro II... nomina Matera tra le parocchie della diocesi di Acerenza, non già tra le sue suffraganee."
