A few steps from chic Avenue Montaigne and the renowned Champs-Elysées sits the elegant Haussmann building where Stéphanie Coutas found her personal refuge. Spread over 3,875 square feet, the four-bedroom apartment initially comprised a series of enclosed rooms. For this project, which kept Coutas busy for 18 months, the French designer wanted to create more flow and highlight her extensive art collection.