Pietro, born at Bergamo in 1693, was sent when very young to study the violin under Corelli at Rome. His early career has not been recorded; but it appears that, after travelling as a distinguished violinist in Italy, Germany, France, and England, he fixed his residence at Amsterdam, where he established a public concert. At his death in 1764, the members of the Amateur Society of Amsterdam went into mourning. His compositions are full of new passages and difficulties unknown before his time, but they contain also many graceful and pleasing movements. His Caprices are excessively difficult; and it is evident that the celebrated Paganini had studied them carefully, and availed himself of the inventions contained in them. In command of the violin and knowledge of its resources, Locatelli far excelled all other violinists of that period. The Count Benvenuto di San Raffaele, royal director of studies at Turin, and an excellent violinist, published in 1784 Letters on the Violin (Lettere, &c.), in which he writes in the highest terms of Locatelli's playing. The following list of Locatelli's published works is taken by the writer of this article from the list (down to opera 6) prefixed by Locatelli himself to his sixth work. The Privilege, at the end of the volume, is in Dutch, and dated at the Hague, July 24th 1731; "Opera 1st. XII. Concerti; Op. 2nd. XII. Sonate per il Flauto Traversiere Solo e Basso; Op. 3rd. L'Arte del Violino, XII. Concerti con XXIV. Capricci; Op. 4th. Set Introduzioni Teatrali, e Sei Concerti; Op. 5th. Sei Sonate a tre, a due Flauti Traversieri, con due Bassi; Op. 6th. XII. Sonate a Violino Solo e Basso." From this list and the Privilege, it is clear that Locatelli's Opera 6th was not first published in 1737, as has been erroneously stated, but in 1731. An edition was published at Paris in 1801. Op. 7th. VI. Concerti a quattro; Op. 8th. VI. Sonate a tre, due Violini e Basso; Op. 9th. L'arte di nuova Modulazione, the latest edition of which was published by Frey, at Paris, under the title of Caprices; Op. 10th. Contrastio Armonico, Concerti a quattro.