in Venice In 1712, Count Orsini-Rosenberg was married to Countess Maria Dominika von Kaunitz (1689–1756), a daughter of Count Dominik Andreas von Kaunitz, Baron of
Šlapanice, and Countess Maria Eleonora von
Sternberg. Through her elder brother, Count
Maximilian Ulrich von Kaunitz, she was aunt to
Wenzel Anton, Prince of Kaunitz-Rietberg. Together, they were the parents of: • Countess Josepha Caterine von Orsini-Rosenberg (1718–1758), who died unmarried. • Countess Maria Anna von Orsini-Rosenberg (1719–1756), who married Count Franz von Thurn und Valsássina-Como-Vercelli,
Privy Councillor of the Emperor, Imperial Chamberlain,
hofmeister of
Peter Leopold, Grand Duke of Tuscany, in 1747. • Count
Vinzenz Ferrerius von Orsini-Rosenberg (1722–1794),
Privy Councillor of the Emperor, Imperial Chamberlain, Governor of
Carniola and
Carinthia; he married Countess Marie Juliana von
Stubenberg, in 1756. • Countess Maria Antonia von Orsini-Rosenberg (1723–1762), who married Johann Gottfried
Heister,
Privy Councillor of the Emperor, Imperial Chamberlain,
Governor of Tyrol, in 1741. • Count Sigmund Andreas von Orsini-Rosenberg (b. 1725), who died unmarried. • Countess Marie Ernestina von Orsini-Rosenberg (1729–1764), who married Count Karel Ujfalussy, Colonel of the
Imperial Army, in 1756. After the death of his first wife in
Venice in 1756, he met
Giustiniana Wynne (1732–1791), daughter of an English baronet, Sir Richard
Wynne. The former lover of Italian statesman
Andrea Memmo and rake
Giacomo Casanova, she married Orsini-Rosenberg in 1758. The Count remained in Venice for eleven years, hosted in
Palazzo Loredan, which he knew as "the ambassador". Count Orsini-Rosenberg died on 5 February 1765 in Vienna.
Descendants Through his son Vinzenz, he was a grandfather of
Franz Seraph of Orsini-Rosenberg (1761–1832), who became 2nd
Prince of Orsini-Rosenberg in 1794 following the death of his second cousin,
Franz Xaver von Orsini-Rosenberg. ==Notes==