Although he attempted other styles, he was not like Casolani an adherent to none. Vanni attached himself to the elegant and florid manner of Barocci, in which he was eminently successful. Of this, the Humiliation of Simon the Sorcerer, which he painted on a stone slab for the church of S. Peter at Rome, affords a proof; a picture which, though recently cleaned with little judgment, is still an object of admiration. Both the design and colouring are in the manner of Barocci; and it is prepared with a due regard to the humidity of that church; nor has it been found necessary to remove it, as has happened to other pictures. He also painted in Siena, and in other Italian cities, where he has approached the manner of Barocci more closely than Viviani, or any other pupil of that artist. His Marriage of S. Catherine, with a numerous group of angels, at the Refugio, is much praised in Siena: as is the Madonna, surrounded by saints, painted for the church of Monna Agnese; and the S. Raymond walking on the Sea, in the possession of the Domenican Fathers, which is supposed by some to be his best picture in Siena, where his works are very numerous. Among the finest pictures in the cathedral of Pisa, is the Dispute about the Sacrament, painted in emulation of his brother Ventura, who had surpassed his usual style in the altar-piece of the angels. At the Umiltà of Pistoia, in the convent of the Camaldules of Fabriano, and in that of the Capuchins of S. Quirico, are some of his most exquisite works; and they are so numerous in other places, that I do not imagine a full catalogue of them has ever been made out. He is generally a follower of Barocci, as we have observed; and amateurs, deceived principally by his colouring, and the heads of his boys, which appear cast in the mould of Barocci, frequently confound the latter with Vanni: but one, well acquainted with Federigo, observes in him more grandeur of design, and greater freedom in the touches of the pencil. The pictures which Vanni executed negligently, or at low prices (of which there are several at Siena), can hardly be recognized as his.