The Art Institute of Chicago Building (initial 1893 main-structure built as the World's Congress Auxiliary Building) houses the Art Institute of Chicago, and is part of the Chicago Landmark Historic Michigan Boulevard District in the Loop community area of Chicago, Illinois. The building is located in Grant Park on the east side of Michigan Avenue, and marks the third address for the Art Institute. The main building was built for the joint purpose of providing an additional facility for the 1893 World's Columbian Exposition, and subsequently the Art Institute. The core of the current complex, located opposite Adams Street, officially opened to the public on December 8, 1893, and was renamed the Allerton Building in 1968.
There have been numerous building additions over the years, as the museum has built over the sunken former Illinois Central line and further into the park. The most recent addition is the Modern Wing funded in part by Pat Ryan. This new building increases gallery space by 33% and accommodates new educational facilities. It opened to the public on May 16, 2009.
