Jonathan Fine. What is the cost of losing or saving Chicago’s past? In this widely anticipated annual event, Preservation Chicago reveals its list of Chicago’s 7 Most Threatened Historic Places of 2012. The purpose of this program is to draw attention to the importance of the chosen historic buildings and districts, and to indicate how the efforts of Preservation Chicago and neighborhood residents will be directed toward preserving them. Past Chicago 7 announcements have played no small part in the eventual landmarking of irreplaceable buildings and spaces such as The Richard Nickel Studio, 444 N. LaSalle Street, and the Wicker Park Commercial District.