1. In 1887, the Wisconsin State Capitol building was officially completed on January 20th, after 11 years of construction. The Capitol is now a national historic landmark and an iconic symbol of Wisconsin.

2. On January 20, 1891, the Milwaukee Athletic Club was founded. Over the years, it has hosted numerous sporting and cultural events, and is still a beloved institution in the city of Milwaukee.

3. In 1921, Wisconsin Governor John J. Blaine signed the first statewide worker's compensation law in the country, guaranteeing medical care and other benefits to workers who were injured on the job. This groundbreaking legislation went into effect on January 20th of that year.

4. On January 20th, 1945, Wisconsin native Laura Ingalls Wilder was awarded the Newbery Honor for her book "These Happy Golden Years," the final installment in her famous "Little House" series. The award is given annually by the American Library Association to the most distinguished children's book published in the United States.

5. In 1953, Dwight D. Eisenhower was inaugurated as the 34th President of the United States on January 20th. Wisconsin had been a crucial swing state in the 1952 presidential election, and Eisenhower's victory helped solidify the state's reputation as a bellwether in national politics.