Trissino's ideas about a synthetic Italian standard were opposed by two major factions. On the one side were those, like Machiavelli, who supported the spoken version of the Tuscan dialect. On the other, Pietro Bembo argued that the Italian standard should be based on the language of the Florentine classics of the 14th century, especially Petrarch and Boccaccio (Dante's language was considered too unpolished). By the end of the century, Bembo's position prevailed and Trissino's ideas were rejected. "I Simillimi" (1548) which is a version of the "Menæchmi" of Plautus, "I Ritratti" (1524) which is a composite portrait of feminine beauty, and the "Poetica", which contains his summing up of the Aristotelean principles of literary composition, comprise the rest of his important writings.