The historical
Diocese of Bisarchio (
Bisarchensis, Gisarchensis) was located in the
province of Sassari, district of
Nuoro, with the episcopal residence at
Ozieri. The first bishop mentioned is
Costantino Madrone (c. 1102), who was succeeded in 1116 by Bishop Pietro. The cathedral was built in 1153. The bishop's residence changed several times, to
Giracle, and again to Ardera. In 1170, Archbishop Alberto of Torres (Sassari) presided over a provincial synod, in which the bishop of Bisarchio, Giovanni Thelle, participated. In 1350, the Doria family of Genoa ceded their rights in Sardinia to the kings of Aragon.
Peter IV of Aragon nominated Fra Francesco, the guardian of the Convent of Castellón (diocese of Gerona), to be bishop of Bisarchio; he was approved by
Pope Clement VI, and became the first Franciscan bishop in Sardinia. In 1495, King
Ferdinand II of Aragon submitted to
Pope Alexander VI a plan for the diminution in the number of dioceses in Sardinia, and the consolidation of several of the dioceses, many of which were suffering financial difficulties. In 1503, at the death of Bishop Calcerando of Bisarchio, the diocese of Bisarchio was incorporated into the
diocese of Alghero.
Reestablishment of diocese of Bisarchio The diocese was reestablished by
Pope Pius VII in his
Bull, "Divina Disponente," of 9 March 1803. Eighteen months later, Giannantioco Azzei was appointed the first bishop of the restored diocese. In 1819, he was transferred to the archdiocese of
Oristano, his birthplace. The episcopal residence was then definitely transferred to Ozieri. The change of name took place in 1915. ==Bishops==