The madrigal is a musical composition that emerged from the convergence of humanist trends in 16th-century Italy. First, renewed interest in the use of Italian as the vernacular language for daily life and communication, instead of Latin. In 1501, the literary theorist Pietro Bembo (1470–1547) published an edition of the poet Petrarch (1304–1374); and published the "Oratio pro litteris graecis" (1453) about achieving graceful writing by applying Latin prosody, careful attention to the sounding of words, and syntax, the positioning of a word within a line of text. As a form of poetry, the madrigal consisted of an irregular number of lines (usually 7–11 syllables) without repetition.