Richard M. Daley served as the Mayor of Chicago from 1989 to 2011, making him the longest-serving mayor in the city's history. He is the son of Richard J. Daley, who was also a prominent mayor of Chicago. During his tenure, Daley focused on urban development, public safety, and improving the city's infrastructure. Daley was known for his efforts to revitalize downtown Chicago, including the development of Millennium Park and the renovation of Navy Pier. His administration faced challenges, including issues related to crime and public education, but he remained a significant figure in Illinois politics throughout his career.