Giuseppe Marc Antonio Baretti (1719-1789), Italian critic, was born at Turin in 1719. He was intended by his father for the profession of law, but at the age of sixteen fled from Turin and went to Guastalla, where he was for some time employed in a mercantile house. His leisure hours he devoted to literature and criticism, in which he became expert. For many years he led a wandering life, supporting himself chiefly by his writings. At length he arrived in London, where he remained for a considerable time. He obtained an appointment as secretary to the Royal Academy of Painting, and became acquainted with Johnson, Garrick and others of that society. He was a frequent visitor at the Thrales'; and his name occurs repeatedly in Boswell's Life. In 1769 he was tried for murder, having had the misfortune to inflict a mortal wound with his fruit knife on a man who had assaulted him on the street. Johnson among others gave evidence in his favour at the trial, which resulted in Baretti's acquittal. He died in May 1789. His first work of any importance was the Italian Library (London, 1757), a useful catalogue of the lives and works of many Italian authors.

The Lettere famigliari, giving an account of his travels through Spain, Portugal and France during the years 1761-1765, were well received, and when afterwards published in English (4 vols., 1770), were highly commended by Johnson. While in Italy on his travels Baretti set on foot a journal of literary criticism, to which he gave the title of Frusta letteraria, the literary scourge. It was published under considerable difficulties and was soon discontinued. The criticisms on contemporary writers were sometimes just, but are frequently disfigured by undue vehemence and coarseness. Among his other numerous works may be mentioned a useful Dictionary and Grammar of the Italian Language, and a dissertation on Shakespeare and Voltaire. His collected works were published at Milan in 1838.