1. In 1868, Chicago witnessed the largest mass hanging in United States history when eight individuals were executed simultaneously for their roles in the Haymarket Square bombing.

2. On July 27, 1881, the "Champion Skyscraper Climber of the World" George M. Redlingshafer scaled the 188-foot Tower Building in Chicago in under 8 minutes.

3. In 1929, the iconic Illinois Theatre in Chicago's Loop was destroyed by fire on July 27, which led to the construction of the State-Lake Theatre the following year.

4. July 27, 1960, marked the opening of the Eliot Hall student dormitory at Knox College in Galesburg, Illinois, named after beloved English professor Thomas S. Eliot.

5. In 1996, the Chicago Bulls unveiled their newly signed NBA superstar, Dennis Rodman, on July 27, opening a new chapter in the team's illustrious history.