1. On January 23, 1859, gold was discovered in Colorado, sparking the Pike's Peak Gold Rush. This discovery led to a rapid influx of people to Colorado and helped to establish the state's mining industry.

2. In 1875, the Colorado State Capitol building was completed on January 23. The building's distinctive gold dome is made of real gold leaf and has become an iconic symbol of the state.

3. On January 23, 1909, the first bridge over the Arkansas River in Pueblo was completed. The bridge helped to connect the town with other parts of the state and facilitated trade and transportation.

4. In 1968, the Air Force Academy Chapel in Colorado Springs was dedicated on January 23. The chapel's unique architecture and design have made it a popular tourist attraction and an important landmark for the Air Force Academy.

5. On January 23, 1986, the Denver Broncos played in their second Super Bowl in team history. Despite a strong performance from quarterback John Elway, the Broncos lost to the New York Giants by a score of 39-20. The game remains a memorable moment in Broncos history.