ON OCTOBER 5-7, 2001, the Chicago Dermatological Society (CDS) met and celebrated the 100th anniversary of its founding with a series of scientific events and social gatherings. Some of the articles submitted in celebration of this meeting are published in this issue of the ARCHIVES. For the early years of dermatology in Chicago and of the Society (1901-1950), the brief history that follows is largely drawn from a recent source1 and a current excellent encyclopedic account.2