Count Ignazio Alessandro Cozio di Salabue (1755–1840) was an Italian count known as the first great connoisseur and collector of violins. A trove of correspondence and memoirs on the history of violinmaking known as the Carteggio forms the basis of his biography. Cozio's meticulous notes on nearly every instrument that passed through his hands contributed enormously to the body of knowledge surrounding Italian violinmaking.