Whether an individual landmark or part of a local historic landmark district, the following properties for sale in Chicago are all legally protected from demolition. The mayor and City Council approve these historic sites after the nine-member Commission on Chicago Landmarks presents its recommendations that must meet a minimum of two criteria: site of a significant event, critical part of the city’s heritage, association with a significant person, important piece of architecture, important architect, distinctive theme as a district, or unique visual feature. While not every homeowner is interested in taking on the stewardship of such buildings, there are preservation-minded people out there who want to protect a piece of the past. Tourists from all over the world come to visit the city, which is renowned for its influential architecture, having been the birthplace of the skyscraper and the hometown of numerous prominent architects. Let’s review five landmark properties currently on the market, including an architectural masterpiece that is one of the best examples of prairie style in the city that once was home to two important political figures.