1. On December 29, 1975, the longest bridge in Illinois, the Gateway Arch Bridge, was opened. This stunning bridge, located in the St. Louis metro area, spans almost 2 miles across the Mississippi River and was a significant engineering accomplishment for the state.

2. Chicago’s O'Hare International Airport, one of the busiest airports in the world, was officially opened on December 29, 1955. The airport was named after World War II hero Butch O'Hare, a fighter pilot who died in action.

3. In 1837, the first train to run in Illinois, the Northern Cross Railroad, made its inaugural trip from Meredosia to Springfield. This historic event took place on December 29, marking the beginning of the railroad industry in Illinois.

4. On December 29, 1890, the Sherman Antitrust Act was upheld by the United States Supreme Court in a landmark decision that had far-reaching implications for American industry. The case involved the American Sugar Refining Company, and the ruling set a precedent for anti-monopoly legislation that continues to this day.

5. In 2008, the historic Highland Park Country Club in Chicago was destroyed by fire on December 29, leaving the community mourning the loss of a treasured local landmark. The 100-year-old building, known for its stunning architecture and picturesque views of Lake Michigan, was a popular gathering spot for local residents and golf enthusiasts alike.