Lionello Spada was one of the leading geniuses of the school. Sprung from the lowest origin, and employed by the Caracci as a grinder of colours, by dint of hearing their conferences, and observing the process of their labours, he began to design; first under them, and next with Baglione, he acquired a knowledge of the art; during several years studying no other models besides the Caracci. He lived on familiar terms with Dentone, and thus became skilful in the use of perspective. Incensed by a jest of Guido's, he determined to seek revenge by opposing his delicacy of manner with another more full and strong; for which purpose going to Rome, he studied both there and in Malta under Caravaggio, and returned home master of a new style. It does not indeed lower itself to every form, like his, but still is not so elevated as that of the Caracci: it is studied in the naked parts, but not select; natural in point of colouring, with good relief in the chiaroscuro, but too frequently displaying a ruddy tone in the shadows, giving an expression of mannerism. One of Lionello's most characteristic marks is a novelty and audacity, the result of his natural disposition, which was equally agreeable for its pleasantry, and hateful for its insolence. He often competed with Tiarini, always superior in point of spirit and force of colouring; but inferior in all the rest. Thus at S. Domenico, where he represented the saint in the act of burning proscribed books; and this is the best picture on canvass which he exhibited at Bologna. At S. Michele in Bosco also is seen his Miracle of St. Benedict, which the young artists call the Scarpellino of Lionello; a picture so wholly novel as to induce Andrea Sacchi, who was greatly struck with it, to copy the design. In a similar way at the Madonna di Reggio, where both artists painted as usual in competition, as well in oils as in fresco, they appeared, as it were, to go beyond themselves. We often meet with specimens of Spada in private galleries; holy families and scripture histories in half-length figures, like those of Caravaggio and Guercino; his heads full of expression, but not very select. He seems most frequently to have repeated the decollation of St. John the Baptist, often met with in the Bolognese galleries, and the best perhaps is in that of the Malvezzi.