The Congress Hotel at 520 S. Michigan is "one of the most beautiful hotels in the middle west," according to this postcard. Published by the Aero Distributing Co., Chicago. The Congress Plaza Hotel at 520 S. Michigan Avenue is one of Chicago’s oldest and largest hotels. It was also one of the tallest buildings in Chicago for a time. With over 800 hotel rooms and so many people coming and going over the years, the Congress Plaza has seen its share of accidents, drug overdoses, murders, and suicides, earning it the distinction of being the most haunted hotel in the city. The Congress Plaza Hotel was built in 1893 to house visitors to the World’s Columbian Exhibition. In the 1920s, mobster Al Capone was known to play cards on Friday nights in a meeting room at the hotel. According to the Choose Chicago website, Capone also had a private suite on the hotel’s eighth floor. Some say that ghosts of the victims of the 1929 St. Valentine’s Day Massacre, which was believed to be or...