one of the most famous and distinguished painters of the Italian school, was born at Bologna in 1575. He was trained first by Denis Calvart (see CALVART), and finally by the Caracci; but having had the misfortune to excite the jealousy and suspicion of the latter, he deemed it expedient to remove to Rome, where he studied specially Raphaelle and Caravaggio, whose works had the strongest influence in moulding his yet unformed style. A commission from the Pope Paul V., was among the first earnt of his future distinction; but as he had great difficulty in getting payment for his work, he quitted Rome in disgust, and retired to his native town, where he extended his already wide reputation. He afterwards returned to Rome, where he seems to have contracted habits of gambling and dissipation. To repair his losses, he seems to have begun the practice of painting swiftly and carelessly; but his spirits gave way, and he sank into a sort of lethargy, from which nothing could rouse him. He died in great poverty in 1642. Guido's personal beauty was so striking, that when in the atelier of the Caracci, he often sat to Ludovico, whose favourite pupil he was, as a model for an angel. His own pieces are distinguished by a grace, lightness, elegance, and delicacy, that will secure for him a lofty niche in the artistic temple of fame. For a detailed criticism of his works, see PAINTING; and LANZI'S Storia Pittorica della Italia.