Philéas Gilbert was a renowned French chef and culinary writer who worked during the late 19th and early 20th centuries. He is best known for co-authoring 'Le Guide Culinaire' (1903) with Auguste Escoffier, which became one of the most influential cookbooks in classical French cuisine. Gilbert also wrote 'La Cuisine Retrouvée' and other culinary works that helped codify and preserve traditional French cooking techniques. He was considered one of the leading authorities on French gastronomy during his era.