Nope, it's not another diffusion line (although one of those does exist as well). Anna Sui is celebrating its 30th anniversary this year with the launch of a first-ever retrospective book. In honor of such a milestone, Sui and Anthropologie, who have a longstanding relationship, got a little anthropological and selected three iconic Anna Sui dresses to resurrect and sell exclusively at Anthropologie stores. The dresses are each from a past collection--Fall 2005, Spring 2001 and Spring 2007 to be exact--and were key looks from their respective seasons.