“Lanvin Boutique” located in Ginza central street; one of the busiest fashion district in down town Tokyo, is a flagship shop of a French fashion brand famous for their long history in haute couturier. The history of Lanvin began when Jeanne Lanvin, who used to make beautiful clothes for her daughter, gradually attracted public attention. To express Lanvin's values on their tradition and their spirit, we thought that “French mansion”, where modern and traditional meet, would be an appropriate starting point for our design. The excellent sewing technique of the brand is translated into the building by embedding 3000 clear acrylic cylinders into a steel plate to give the impression of Lanvin's diamond encrusted party dress. The acrylic windows became small display windows where the interior is reflected kaleidoscopically.