Duke of Carcaci () (pron: "Car-catch-ee") is a title in the Kingdom of Sicily, held by the head of one branch of the House of Paternò, a major Sicilian noble family. The estate of Carcaci, from which the dukedom and the branch is named, is situated in Sicily, 20 miles north-west of Catania (where survives the ducal palazzo), at the junction of the River Simeto and River Salso. It is thus situated about 15 miles west of the crater of Mount Etna. The first Duke of Carcaci was Don Vincenzo Paternò Castello (1681–1767) who in 1725 was created in Vienna a duke in the Kingdom of Sicily by Charles VI, Holy Roman Emperor and King of Sicily. Carcaci had become the seat of a feudal barony shortly after the Norman Conquest of Sicily in 1061, when the first castle was built on the site. The barony and estate was acquired by this branch of the Paternò family in 1719. Dukes of Carcaci (1725) Don Vincenzo Paternò Castello, 1st Duke of Carcaci (1681–1767), born in Catania, 2nd son of Don Giacinto Paternò Castello, Baron of Bicocca and Donna Agata Paternò, daughter of Vincenzo 8th Barone di Raddusa. He succeeded in 1695 as 3rd Baron of Bicocca. Acquired the estate of Carcaci in 1719 and invested as 1st Duke of Carcaci in Vienna on 27 March 1725. Leader of the Parliament of the Kingdom of Sicily in 1732, Vicar General of the Kingdom of Sicily 1743/1746, Ambassador to King Vittorio Amedeo II of Savoy in 1713; Chief Justice of Catania 1704/1705 and 1718/1719, Patrician of Catania 1715/1715 and 1721/1722. He married in 1697 in Catania Donna Anna Maria Paternò, daughter of Don Francesco Maria Paternò, Baron of Raddusa by his wife Silvia Trigona di Spedalotto. Don Mario Concetto, 2nd Duke of Carcaci (1700–1781). Succeeded his father as 2nd Duke and 2nd Baron of Carcaci in 1767. He purchased the Barony of Placa e Bajana for his son. At Catania in 1727 he married Donna Giovanna Maria Rizzari, daughter of Don Francesco, Duke of Tremestieri . Don Giuseppe Vincenzo 3rd Duke of Carcaci (1728–1817), born at Catania, 1st Baron of Placa e Bajana (1774), 3rd Baron of Carcaci (1768) and 3rd Duke of Carcaci (invested 1781). Served as Sindaco of Catania in 1765, Capitano Giustiziere of Catania in 1770. Appointed a Knight of the Order of Malta in 1777, and Captain of Arms