French Renaissance architecture developed in the 15th and 16th centuries, seen in early examples like the Château d'Amboise where Leonardo da Vinci spent his last years. The Château de Chambord combined Gothic structure with Italian ornamentation. Architects like Philibert Delorme and Sebastiano Serlio helped establish a French Mannerism known as the Henry II style, seen in their works at the Château de Chenonceau and Château de Fontainebleau, where Italian artists like Rosso Fiorentino formed the First School of Fontainebleau.