Here are 5 interesting facts about April 7 in Florida history:

1. In 1821, William Pope Duval was appointed as the first territorial governor of Florida by President James Monroe. Duval served as governor for 12 years and was instrumental in the early development of the territory.

2. In 1906, the town of Miami was incorporated. Miami had been an important trading post and steamer stop on the Miami River for many years, but the incorporation brought new growth and development to the area.

3. In 1927, the historic Biltmore Hotel opened in Coral Gables. The hotel, designed by architect George Merrick, was built in the Mediterranean Revival style and quickly became a popular destination for celebrities and socialites.

4. In 1940, the first Major League Baseball game was played in Miami at the newly built Miami Stadium. The game featured the Brooklyn Dodgers and the New York Yankees, and was attended by over 25,000 fans.

5. In 2002, NASA launched the Gravity Probe B mission from Cape Canaveral. The mission was designed to test key predictions of Einstein's theory of general relativity, and involved a spacecraft carrying four ultra-precise gyroscopes. The mission was a success and its results have been used to advance our understanding of the nature of space and time.