Chicago-based scholar and architect Alexander Eisenschmidt has partnered with New York architecture firm Cheng+Snyder to produce Visionary Chicago at the Museum of the Phantom City, an iPhone app that reveals past utopian schemes for Chicago that were never built. Join Eisenschmidt, Cheng, and Snyder for a walking tour and demonstration of the app in downtown Chicago, and visit sites of unbuilt plans by architects such as Aldof Loos, Hans Hollein, and Greg Lynn, to name a few.