A great deal more than just a gardener, André Le Nôtre (1613–1700) undeniably had a background in architecture. It has nevertheless been noted that he regularly cooperated with architects whose role in the design of his gardens has led to different interpretations. Based upon hitherto unpublished documents, this article examines the respective roles of André Le Nôtre and Daniel Gittard in the creation of the gardens of Chantilly as well as the ones of the gardener and Louis Le Vau in the construction of the Grande Terrasse at Saint-Germain-en-Laye, and reevaluates of the nature of their cooperation at Vaux-le-Vicomte.