Thomas Sébillet (1512–1589) was a French jurist, an essayist and a neo-Platonist grammarian. He is now remembered for his Art Poétique (Poetic Art) from 1548, on French verse. He was strongly contradicted later by Joachim du Bellay, whose art poétique became normative. This "decapitation of richesse" led to a centralisation of language, too (additionally to the concentration of political power). Equally advocate in Parliament, he was a favourite of Michel de l'Hospital, Étienne Pasquier and Pierre de l'Estoile.