4 route du Champ d'Entraînement, also known as Villa Windsor, is a historic villa in the 16th arrondissement of Paris, France. It is located within the northwest section of the Bois de Boulogne, close to the southern edge of Neuilly-sur-Seine. It was the main residence of the Duke and Duchess of Windsor from 1953 until the Duke's death in 1972, and the Duchess continued to live there until she died in 1986.