bicycle stations", and would be natural for bicycle friendly cities to emulate. Exelon Pavilions The Exelon Pavilions are a set of four solar energy-generating structures in Millennium Park. The pavilions provide sufficient energy to power the equivalent of 14 Energy star-rated energy-efficient houses in Chicago. The pavilions were designed in January 2001 and construction began in January 2004. The Southeast and Southwest Exelon Pavilions (jointly the South Exelon Pavilions) along Madison Street were completed and opened in July 2004, and flank the Lurie Garden. The Northeast and Northwest Exelon Pavilions (jointly the North Exelon Pavilions) flank the Harris Theater along Randolph Street and were completed in November 2004, with a grand opening on April 30, 2005. Besides producing energy, three of the four pavilions provide access to the park's underground parking garages and the fourth serves as the park's welcome center. Exelon, a company that generates the electricity transmitted by its subsidiary Commonwealth Edison, donated approximately $6 million for the pavilions. Boeing Galleries The Boeing Galleries are a pair of outdoor exhibition spaces within Millennium Park; they are located along the south and north mid-level terraces, above and east of Wrigley Square and the Crown Fountain. They were added after the park opened; in March 2005, Boeing President and Chief Executive Officer James Bell announced the firm would make a $5 million grant to fund construction of the spaces, and for an endowment to "help fund visual arts exhibitions" in them. The galleries, which were built between March and June 2005, have hosted grand-scale art exhibits, some of which have run for two full summers. Chase Promenade The Chase Promenade is an open-air tree-lined pedestrian walkway in Millennium Park that opened July 16, 2004. The promenade was made possible by a gift from the Bank One Foundation; Bank One merged with JPMorgan Chase in 2004, and the name became Chase Promenade. The walkway accommodates exhibitions, festivals and other family events. It also serves as a private-event rental venue. The Chase Promenade hosted the 2009 Burnham Pavilions, which were the cornerstone of the citywide Burnham Plan centennial celebration. Nichols Bridgeway The Nichols Bridgeway, a pedestrian bridge that opened on May 16, 2009, connects the south end of Millennium Park with the Modern Wing of the Art Institute of Chicago. The bridge begins at the southwest end of the Jay Pritzker Pavilion's Great Lawn and extends across Monroe Street, where it connects