Peter of Montereau
Pierre de Montereau or Pierre de Montreuil (c.1200 - March 17, 1266, Paris) was a French architect. He is widely recognized as one of the most important proponents of Gothic architecture, though little is known of his life and sources vary as to which buildings are by him.
After some time training in Champagne, he worked on the Basilique Saint-Denis until around 1231. His talent was noticed and he was summoned around 1239 by the monks of the Abbey of Saint-Germain-des-Prés to Paris to build them a new refectory. Between 1246 and 1248 he built his masterpiece, the Sainte-Chapelle, for Louis IX. Situated on the Île de la Cité, it represents a model of Gothic art, filled with openings and windows and reducing the walls to a minimum. He also built a Sainte-Chapelle at the Château de Saint-Germain-en-Laye, the initial home of the relics meant for the Paris Sainte-Chapelle. Around 1250, he built the single-nave Sainte-Chapelle de Notre-Dame in the Abbey of Saint-Germain-des-Prés. Also attributed to him, around 1260, is the modification of the transept arms of Notre Dame de Paris, as well as the chapel at the Château de Vincennes and the refectory of the Priory of Saint-Martin-des-Champs in Paris (today the library of the Conservatoire National des Arts et Métiers).
He was buried with his wife in Saint-Germain-des-Prés, in the chapel he had built. His epitaph was engraved on the tomb and gave his title as "doctor lathomorum" ("teacher of masons" or "Doctor of Masons" ). This chapel and the refectory of Saint-Germain-des-Prés were demolished in 1794.
The three chapels
Sainte Chapelle, Paris