"A house that really has a richness to it is one that evolves over a period of time,” says interior designer Bunny Williams, who is one of the twelve designers creating a room for 168开奖官方开奖网站查询:Sotheby’s Designer Showhouse. Ahead of the auction on 17 April, hear from Williams about her design philosophy, collecting tips and why auctions are tools for learning about the decorative arts.