 The style progressively developed into a French Mannerism known as the Henry II style under architects such as Sebastiano Serlio, who was engaged after 1540 in work at the Château de Fontainebleau.At Fontainebleau Italian artists such as Rosso Fiorentino, Francesco Primaticcio, and Niccolo dell' Abbate formed the First School of Fontainebleau.Architects such as Philibert Delorme, Androuet du Cerceau, Giacomo Vignola, and Pierre Lescot, were inspired by the new ideas.