In the 17th Century Pope Benedict XIII beatified Angelo Carletti, giving official approval to the cult that had for long been paid to Angelo, especially by the people of Chivasso and Coni.
Antipope Benedict XIII (1328–1423), based in Avignon, France in opposition to the Pope in Rome
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The Council of Constance (1414–1418) successfully ended the Schism by deposing two Popes (John XXIII and Benedict XIII) – the third Pope abdicated – and electing a successor in Martin V.
In 1724 he was named by pope Benedict XIII Bishop of Arezzo where a diocesan synod was celebrated in 1730 under his leadership.
In 1413, pope Benedict XIII elevated it to the rank of collegiate, until it become a cathedral in 1510.
In 1727, Benedict XIII founded the Universitas Studii Generalis with the faculties of theology, jurisprudence, medicine, and mathematics.
In 1417, the Council of Constance resolved the Schism, proclaiming Martin V the new Pope and demanding that Benedict XIII renounce his claim.
On 20 September 1415, the Emperor met with Pope Benedict XIII at the palace with the King Ferdinand I of Aragon and the delegations of the Counts of Foix, Provence, Savoy, Lorraine, the embassy of the Roman church for the Council of Constance, and embassies from the Kings of France, England, Hungary, Castille and Navarre.