In June 2008, there was an announcement that the pavilions would be constructed.The pavilions were commissioned by the Burnham Plan Centennial Committee, a group of civic leaders who collaborated closely with the City of Chicago Department of Cultural Affairs, the Art Institute of Chicago, and Millennium Park Inc.On April 7, 2009, the designs were unveiled for the pavilions set to open on June 19 and to continue on display on the south end of the Chase Promenade until October 31.Delays were caused as a result of manufacturing. This may cause the pavilions to stay on exhibit until November. Additionally, the Hadid Pavilion may be situated in a different part of the park for part of 2010.The choices of Hadid and van Berkel were somewhat controversial because Burnham was a classicist and they are both avante-garde modernists.Additionally, local architects complained that it was a bit of a slight that two European architects were chosen to produce works to serve as the focal points of the Burnham Plan Centennial celebration.The pavilions were scheduled to be a focal point of the centennial celebration of the 1909 Plan of Chicago,which is a yearlong celebration.However, Hadid's Pavilion encountered manufacturer's difficulty in executing Hadid's complex, computer-aided design.