Bold theorist of new architecture, Charles-Édouard Jeanneret, better known as Le Corbusier, offers the following advice in his Manual of the Dwelling:
Demand that the bathroom, fully sunlit, be one of the largest rooms in the apartment, the old living room for example. With full-length windows, opening, if possible, onto a terrace for sunbathing, a porcelain washbasin, a bath-tub, showers, and gym equipment. In the adjacent room: a walk-in wardrobe for dressing and undressing. Do not undress in your bedroom. It is not very clean and it creates a distressing disorder.