STANISLAO, a pupil of the celebrated Padre Martini, was born at Bologna on 10th February 1750. His love of music was early awakened by hearing the daily service in the church of the Cordeliers; and Padre Martini having remarked his close attendance, took an interest in the boy, and induced him to enter his own convent (that of St Francis) as a novice. There Mattei was taught music by Padre Martini, took the vows, and was ordained. He remained constantly with his master till the death of the latter, who left his books and manuscripts in the hands of his pupil, with the hope that Mattei would complete the fourth volume of the *Storia della Musica*. But Mattei probably felt his incompetency, for he never published any part of that volume. The writer of this article was introduced to Mattei in Feb. 1819, and had a good deal of conversation with the old man, who spoke with great affection of his master, a portrait of whom he kept in his bedroom. Speaking of his *quondam* pupil, Rossini, he said,—“I never could get him to study attentively, and therefore he often writes incorrectly; but he is full of talent, and his head works like a Vesuvius.” Some notice of the library of Padre Martini has been taken in this work, under the article BURNEY. Mattei succeeded Padre Martini as chapel-master of St Francis' church, and produced a number of masses, motets, &c., most of which remain in manuscript at Bologna. He afterwards became chapel-master of St Petronio, and held that office till his death on the 17th May 1825. In 1804 he was appointed professor of musical composition in the Liceo of Bologna, and taught many pupils, among whom were Rossini, Morlacchi, Donizetti, &c. He was president of the Philharmonic Society of Bologna in 1791-94; and in 1808 became a member of the musical section of the Italian Institute of Arts and Sciences. On 24th January 1824 he was named one of the associates of the French Academy of the Fine Arts. His work on accompaniment and counterpoint is held in no esteem except for the musical examples, which are all well written. (a.f.g.)