 Petrarch popularized the sonnet as a poetic form; Giovanni Boccaccio's "Decameron" made romance acceptable in prose as well as poetry; François Rabelais rejuvenates satire with "Gargantua and Pantagruel"; Michel de Montaigne single-handedly invented the essay and used it to catalog his life and ideas.Perhaps the most controversial and important work of the time period was a treatise printed in Nuremberg, entitled "De Revolutionibus Orbium Coelestium"