With Canini worked Giambatista Passeri, a Roman, a man of letters, and who became afterwards a secular priest. It is recorded, that in the early part of his life he lived on very intimate terms with Domenichino at Frescati, and he adhered much to his style. There exists by him a Crucifixion between two Saints at S. Giovanni della Malva, but no other work in public, as most of his pictures are in private collections. In the Palazzo Mattei are some pictures representing butcher's meat, birds, and game, touched with a masterly pencil; to these are added some half figures, and also some sparrows (_passere_), in allusion to his name. There is also, by his hand, at the academy of S. Luke, the portrait of Domenichino, painted on the occasion of his funeral; on which occasion Passeri, and not Passerino, as Malvasia states, recited a funeral oration, and probably paid some poetical tribute to his memory, since he was accustomed to write both verse and prose as Bellori did; and his silence on the Lives of Bellori, which had then appeared, and which he had numerous opportunities of noticing, probably arose from feelings of jealousy. He is esteemed one of the most authentic writers on Italian art; and if Mariette expressed himself dissatisfied with him, (v. Lett. Pitt. tom. vi. p. 10,) it probably arose from his having seen only his Life of Pietro da Cortona, which was left unfinished by the author. He possessed a profound knowledge of the principles of art, was just in his criticisms, accurate in his facts; if, indeed, as has been pretended by a writer in the _Pittoriche Lettere_, he did not in some degree depreciate Lanfranc, in order to raise his own master, Zampieri. His work contains the lives of many painters, at that time deceased, and was published anonymously, it is supposed, by Bottari, who in many places shortened it, and improved the style, which was too elaborate, containing useless preambles, and was occasionally too severe against Bernino and others, on which account the work remained unedited for more than a century. Vincenzio Manenti, of Sabina, who was first the scholar of Cesari, and afterwards of Domenichino, left many works in his native place. Some pictures by him are to be seen in Tivoli, as the S. Stefano in the Duomo, and the S. Saverio at the Gesù, which do not exhibit him as an artist of very great genius, but assiduous and expert in colouring. Of Ruggieri, of Bologna, we shall speak elsewhere.