Roman Catholic Diocese of Chiusi-Pienza

The Diocese of Chiusi (Clusinus) was at first immediately subject to the Holy See, but was made a suffragan of archdiocese of Siena by Pope Pius II.

Pope Sixtus IV confiscated the ring, and had it brought to the Vatican, but Clement VIII returned it to Perugia.

Two hundred years later, a wedding ring of the Virgin was being shown in Semur in Burgundy; another is preserved at S. Maria in via Lata in Rome; and another at the abbey of Anchin near Douai in France.

[9] The cathedral was administered and served by a Chapter, originally composed of two dignities (the Provost and the Archpriest) and three Canons (canonici), along with four priests.

[17] In the papal bull "In supereminenti" of 25 September 1600, Pope Clement VIII created the new diocese of Città di Pieve in Tuscany.

[18] The bull mentions that Bishop Ludovico Martelli had recently died, which no doubt simplified the process envisioned by the Pope, since there would be no opposition or appeals from Chiusi.

Pope Clement sent Magister Anselmo Dandini, his papal notary de numero participantium, who was also Referendary of the Two Signatures, as Commissary and Apostolic Visitor, to assess and arrange the divisions ("ad divisionem et assignationem fructuum, redituum et proventuum, ac bonorum huiusmodi procedens").

[19] Pope Clement issued a second bull, "Super Universas", on 9 November 1601, in which he rehearsed all his orders from the first bull, ratified the arrangements made by Magister Dandini, and issued additional instructions for the organization of the diocese of Città di Pieve.

Based on the revisions, a set of Normae was issued on 15 November 1984, which was accompanied in the next year, on 3 June 1985, by enabling legislation.

According to the agreement, the practice of having one bishop govern two separate dioceses at the same time, aeque personaliter, was abolished.