The history and future of Chicago Theater is the subject of a major symposium to be hosted by the Theater Department of Columbia College next year, according to an announcement released today. Capitalizing on Chicago’s storied rise to “theatre capital of America” (as at least one international critic put it), Columbia expects “Sustaining Chicago Theater: Past, Present, and Future,” to draw academics and theater folk from “around the country and overseas” for four days of presentations and performances May 18 through May 22, 2011.