Domenico Silvio Passionei ( Italian: Domenico Silvio Passionei ; December 2, 1682 , Fossombrone , Papal States - July 5, 1761 , Monte Porzio Catone , Papal States) - Italian Curial Cardinal , papal diplomat and doctor of both rights . Pro-Secretary of the Holy Congregation for the Propaganda of the Faith from November 1720 to January 1721. The titular archbishop of Ephesus from July 16, 1721 to June 23, 1738. The Apostolic Nuncio in Switzerland from July 30, 1721 to December 23, 1730. The Apostolic Nuncio in Austria from December 23, 1730 to March 1738. Secretary of the Apostolic Log from March 1738 to July 5, 1761. Pro-Librarian of the Holy Roman Church from July 10, 1741 to January 22, 1755. Camerlengo of the Holy College of Cardinals from January 29, 1748 to January 20, 1749. Librarian of the Holy Roman Church from January 22, 1755 to 5 July 1761. The cardinal-priest with the June 23, 1738, with the title of the church with Mr. Bernardo alle Terme from 23 July 1738 to 17 February 1755, in commendam on 17 February 1755. The Cardinal-Priest of the Church with the title of Santa Prassede from 17 February 1755 to 12 February 1759. The cardinal-priest with the title of the church of San Lorenzo in-Luchina from February 12, 1759. Cardinal Protopresbyter from February 12, 1759.
| His Eminence Cardinal |
| Domenico Silvio Passionei |
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| Domenico Silvio Passionei |
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| February 12, 1759 - July 5, 1761 |
| Predecessor | Cardinal of Thom Philippe Valra d'Anen-Lietar d'Alsace-Boussoux de Chimet |
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| Successor | Cardinal Johann Theodore of Bavaria |
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| January 22, 1755 - July 5, 1761 |
| Predecessor | Cardinal Angelo Maria Quirini |
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| Successor | Cardinal Alessandro Albany |
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| Birth |
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| Death |
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| Holy Order | July 1721 |
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| Episcopal consecration | July 25, 1721 |
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| Cardinal with | June 23, 1738 |
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