The salon vert at Villa Oasis; the consoles on the right were painted by Jacques Majorelle, who was responsible for the original layout of the Villa and its garden.

PARADISE FOUND | An eight-point star of multicolored tile designed by Willis serves as a fountain at Villa Oasis's front entrance; the cactus garden was redesigned by Madison Cox in 2008.

GRAND ENTRANCE | The vestibule at Villa Oasis features traditional Moroccan treatments such as carved plasterwork, marble and tile floors and tooled metalwork on the arched door.

RAISE HIGH THE ROOF BEAM | A view into the dining room, guarded by Pierre Bergé's Shibu Inu, Echo. The vestibule colors are original to the '20s. The coffered cedar ceiling in the dining room features traditional Moroccan motifs.

MIRROR, MIRROR | In the library, entirely designed by Willis, employing traditional wood-carving and stenciling techniques, armchairs from Brazil once belonged to the decorator. On the wall hangs Bergé's collection of Orientalist paintings.

A small nook in the library, which Yves Saint Laurent said was his 'favorite room in the world.'

COLORS OF PARADISE | The view through a pair of painted doors into the library.

MASTER BUILDER | Willis's office in his house, in the heart of the medina.

Willis, circa 1970, photographed by Bergé at Dar El Hanche, the first house he owned with Saint Laurent.

HOME FRONT | The main drawing room at Willis's house, which was one wing of a palace in Marrakech.

UP ON THE ROOM | Talitha and Paul Getty in the '60s, on top of the palace complex Willis restored and renovated for them.

DREAM WEAVER | A boudoir designed by Willis for Dar Zuylen, Marie-Hélène de Rothschild's home on the outskirts of Marrakech.

OUR CROWD | The still popular restaurant Dar Yacout in Marrakech, designed by Willis.

Willis with Saint Laurent (far right), Bergé (middle) and Saint Laurent muse Betty and her husband, the designer Francois Catroux

A watercolor sketch for one of Willis's unrealized projects

SWAN SONG | The master bedroom— Willis's final project, begun a month before his death—was completed by Bergé. The cedar paneling is painted with Moroccan motifs.

COZY CORNER | An alcove in the salon vert brings together several traditional techniques: a richly painted carved cedar arch; intricate tile work; and a slick marble floor.

GREEN DAY | Bergé in the garden.

In the salon vert, a lacquer panel by Jean Dunand hangs above a seating area designed by Jacques Grange.

A corner of the salon vert