[1] Gregory the Great alludes to the episcopal see of Ales (anciently Uselli), in his letter to Januarius of Cagliari in 591.

[2] It would appear that a process has begun to permanently unite the diocese of Ales-Terralba and the archdiocese of Oristano.

Conv., was promoted on 4 May 2019 to be Archbishop of Oristano and on the same date was appointed Apostolic Administrator of his former diocese of Ales-Terralba.

The announcement specifies that this act unifies the two dioceses in persona Episcopi ('in the person of the Bishop').

[4] Erected: 7th Century Diocese of Ales united with Diocese of Terralba: 8 December 1503 Latin Name: Uxellensis et Terralbensis Metropolitan: Archdiocese of Oristano This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed.