Millennium Park, considered Chicago's first and most ambitious early 21st-century architectural project, is opened to the public by Mayor Richard M. Daley.

Millennium Park is a public park located in the Loop community area of Chicago, operated by the Chicago Department of Cultural Affairs. The park, opened in July 2004, is a prominent civic center near the city's Lake Michigan shoreline that covers a 24.5-acre (9.9 ha) section of northwestern Grant Park. Featuring a variety of public art, outdoor spaces and venues, the park is bounded by Michigan Avenue, Randolph Street, Columbus Drive and East Monroe Drive. In 2017, Millennium Park was the top tourist destination in Chicago and in the Midwest, and placed among the top ten in the United States with 25 million annual visitors.

The mayor of Chicago is the chief executive of city government in Chicago, Illinois, the third-largest city in the United States. The mayor is responsible for the administration and management of various city departments, submits proposals and recommendations to the Chicago City Council, is active in the enforcement of the city's ordinances, submits the city's annual budget and appoints city officers, department commissioners or directors, and members of city boards and commissions.

Richard Michael Daley is an American politician who served as the 54th mayor of Chicago, Illinois, from 1989 to 2011. Daley was elected mayor in 1989 and was reelected five times until declining to run for a seventh term. At 22 years, his was the longest tenure in Chicago mayoral history, surpassing the 21-year mayoralty of his father, Richard J. Daley.