1. On April 13, 1906, the historic Hotel Florence opened its doors in the village of Pullman, located on the south side of Chicago. The hotel was named after the Pullman Palace Car Company's founder, George M. Pullman, who built the community of Pullman as a planned industrial town for his employees.

2. On April 13, 1919, a riot broke out in the streets of downtown Chicago during a strike by uniformed Chicago police officers. The violence and chaos lasted for several days, resulting in 38 deaths (including 10 civilians) and hundreds of injuries. The incident, known as the Chicago Race Riot of 1919, was sparked by racial tensions and economic disparities between white and black residents of the city.

3. On April 13, 1945, the Franklin Delano Roosevelt Memorial Foundation was established in Springfield, Illinois. The foundation was created to support the construction of a national memorial in honor of the late President Roosevelt, who was born and raised in Hyde Park, New York.

4. On April 13, 1969, the Illinois State Police raided the Black Panther Party's headquarters in Chicago, resulting in the arrest of several members and the confiscation of weapons and other materials. The raid was part of a larger effort by law enforcement to disrupt and dismantle the Black Panther Party, which had become a symbol of resistance and black power in the United States.

5. On April 13, 1997, the Chicago Cubs played their first game at the newly-renovated Wrigley Field. The stadium, which was built in 1914 and is known for its ivy-covered walls and hand-operated scoreboard, underwent a major renovation in the mid-1990s to improve fan amenities and modernize the facility.