Lenôtre — Courcelles

Gaston Lenôtre opened the Courcelles boutique in 1957 and built the school inside it that trained Pierre Hermé, Pierre Marcolini, and most of the working French pastry establishment. Two generations later the room remains the brand's flagship — the bright, sleek interior on the southern edge of the Plaine Monceau, opposite Parc Monceau, sells the institutional repertoire (Opéra, Schuss, fruit tarts to a polish that reads as still photography) plus the seasonal traiteur programme that lays out the Sunday-lunch tablecloth for half the 17e. The 1957 founding makes it cult-institution by any measure; the school behind it makes it the lineage room.