1. On September 27, 1911, the Wisconsin State Capitol building in Madison was dedicated. It is known for its stunning architecture, including a dome that is the largest cast in the world.

2. In 1916, the Green Bay Packers played their very first football game on September 27. They played against a team from Marinette, Wisconsin and won 17-0.

3. On September 27, 1935, the Social Security Act was signed into law by President Franklin D. Roosevelt. This landmark legislation aimed to provide financial support for America's elderly, disabled, and unemployed citizens.

4. In 1962, Wisconsin Governor Vernon Wallace Thomson died on September 27 while still in office. Thomson was the first Wisconsin governor to die while in office since 1898.

5. On September 27, 1979, the University of Wisconsin-Madison installed the world's largest solar energy system. This massive collection of solar panels covered three acres of land and could generate enough energy to power roughly 300 homes.