Ritzler, Remigius; Sefrin, Pirminus (1913). Hierarchia catholica medii et recentioris aevi. Vol. V. Monasterii Sumptibus et typis librariae Regensbergianae. pp. 114, with note 3. Ruffo belonged to the family of the Dukes of Bagnara.
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Lanzoni, pp. 301–302. Cantel traces the story about "Metropolitan Peter" to the work of Antonio Beatillo in his History of Bari, though he expresses doubts as to its authenticity. Petrus-Josephus Cantel (1684). Metropolitanarum urbium historia civilis et ecclesiastica (etc.) (in French). Vol. Tomus primus. Paris: Stephanus Michallet. p. 415. So too: J.E.T. Wiltsch (1868). Handbook of the Geography and Statistics of the Church. Vol. II. London: Bosworth & Harrison. pp. 24–25. On doubts as to Beatillo's reliability see Giannone, I, p. 528.
Mimmi was born in Poggio di Castro S. Pietro (Bologna). He taught in seminaries for twenty years. In 1930 he was named Bishop of Crema. He was appointed Archbishop of Naples on 30 August 1952. He was named a cardinal by Pope Pius XII in the consistory of 12 January 1953. In 1957 he was named Secretary of the Consistorial Congregation in the Roman Curia. He died in Rome on 6 March 1961. Martin Bräuer (27 February 2014). Handbuch der Kardinäle: 1846-2012 (in German). Berlin: De Gruyter. pp. 1947–1948. ISBN978-3-11-026947-5.
