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https://en.wikipedia.org/wiki/Altieri_family
The Altieri family was an ancient noble family of Rome, present in the history of the city since the Middle Ages, yet now extinct. In addition to the title of Prince granted by the Pontiffs, branches of the Altieri were also part of the aristocracy of Genoa and of Venice. The family consolidated its position in the ranks of the great senatorial and cardinal aristocracy thanks to dynastic marriages with families like the Colonna, Paluzzi, Chigi, Odescalchi, Doria-Pamphili, Ruspoli, Barberini, Borghese and in more recent times the di Napoli Rampolla, relatives of the famous Cardinal Mariano Rampolla del Tindaro, Secretary of State of Pope Leo XIII, not to mention a multitude of princely families of Europe. Their fiefs consisted of the principality of Oriolo Romano and Vejano and the duchy of Monterano in the Alto Lazio. The Altieri were among the protagonists of the history of the city from the earlier Middle Ages until the second half of the twentieth century, reaching the apogee of their power with Emilio Bonaventura Altieri, elected pope in 1670 under the name of Clement X.
Princes of Oriolo and Viano
- Gaspare Altieri, 1650–1720, 1st Prince of Oriolo and Viano
- Emilio Altieri, 1670–1721, 2nd Prince
- Girolamo Antonio Altieri, 1673–1762, 3rd Principe
- Carlo Emilio Altieri, 1723–1801, 4th Prince
- Paluzzo Altieri, 1760–1834, 5th Prince
- Clemente Altieri, 1795–1873, 6th Principe
- Emilio Altieri, 1819–1900, 7th Principe
- Paolo Altieri, 1849–1901, 8th Prince
- Ludovico Altieri, 1878–1955, 9th (and last) Prince