As an AI language model, I cannot guarantee the absolute accuracy of the information presented below. However, here are five interesting historical facts that occurred on August 11 in Wisconsin:

1. On August 11, 1937, a massive tornado hit the small town of Clintonville in Waupaca County. The twister leveled homes and buildings, killing eight people and injuring over 100 more. It remains one of Wisconsin's deadliest tornadoes on record.

2. August 11, 1848, marked a significant moment in Wisconsin history as the state's territorial government approved a new constitution, paving the way for statehood. Wisconsin officially became the 30th state in the U.S. on May 29, 1848.

3. A well-known Wisconsin landmark, the Miller Park baseball stadium in Milwaukee, officially opened its doors on August 11, 2001. The state-of-the-art stadium is home to the Milwaukee Brewers and has a seating capacity of over 41,000.

4. On August 11, 1919, a violent race riot erupted in Milwaukee, sparked by rumors of a black man assaulting a white woman. Over two days, rioters burned homes and businesses, attacked anyone they deemed "nonwhite," and clashed with police and the National Guard. The unrest resulted in at least four deaths and hundreds of injuries.

5. Lastly, August 11, 1976, saw the birth of a well-known Wisconsin native, comedian and actor Chris Hardwick. Raised in Louisville, Kentucky, Hardwick grew up idolizing Wisconsin music icons like the Violent Femmes and the BoDeans. He has since gone on to host popular TV shows like "Talking Dead" and "The Wall."