<P> The opening of the Accademia degli Incamminati brought the Carracci name to great repute and attracted numerous commissions . These projects were typically allocated among the family by Ludovico or completed jointly by the three Carracci . </P> <P> There is much speculation and debate among art historians about which of the Carracci family members designed and executed various aspects of the frescoes that they painted . Extant preparatory sketches for the frescoes indicate that for each artwork, the preliminary sketches were likely created by all of the Carracci collaboratively . Likewise the finished frescoes would have been painted by all three of the Carracci but "despite much debate, there is no consensus among scholars as to the attribution of several scenes ." "When asked who had done each scene, the Carracci, having freely traded ideas and sketches, and having worked elbow to elbow, are claimed to have responded,' it is by the Carracci, we did it together .' Such intimate collaboration, in which the individual style was sublimated in favor of a seamless, lively, and highly illusionistic effect, is characteristic of the Carracci's early period ." </P> <P> From 1583 to 1594, Annibale, Agostino, and Ludovico worked collaboratively to paint frescos on ceilings and walls of palaces in Bologna and Ferrara . One of their first joint commissions was the Palazzo Fava in Bologna . Here the Carracci painted frescoes of the Stories of Europa (1583--84), Stories of Jason (1583 - 84), and Stories of Aeneas (1586). The Carracci family's masterpiece, Stories of the Founding of Rome, was completed circa 1589 - 90, and is located in the main salon at the Palazzo Magnani - Salem in Bologna . In 1592, the Carracci went to Ferrara to decorate the ceiling of Palazzo dei Diamanti with scenes of the "Gods of Olympus ." The following years, 1593--94, the Carracci were commissioned to paint frescoes of New Testament scenes and figures in three rooms of the Palazzo Sampieri - Talon in Bologna . </P> <P> The popularity of the Carracci's frescoes at these Italian palaces (particularly the paintings at the Palazzo Magnani) caught the attention of another noble family, the Farnese . The Duke of Parma and Piacenza, Ranuccio VI, and his brother, Cardinal Odoardo approached the Carracci in 1593 and asked them to come to Rome to decorate the Palazzo Farnese . In 1594 Annibale and Agostino went to Rome while Ludovico stayed in Bologna . "This summons signaled the end of the joint Carracci studio ." </P>

What was the guiding principle in carracci's academy