The Art Institute of Chicago, founded in 1879, is a world-renowned art museum housing one of the largest permanent collections in the United States. An encyclopedic museum, the Art Institute collects, preserves, and interprets works in every medium from all cultures and historical periods. With a collection of approximately 300,000 art works and artifacts, the museum has particularly strong holdings in Impressionist and Post-Impressionist painting, contemporary art, early 20th century European painting and sculpture, Japanese prints, and photography. The museumÍs 2009 addition, the Modern Wing, features the latest in green museum technology and 264,000 square feet dedicated to modern and contemporary art, photography, architecture and design, and new museum education facilities. In addition to displaying its permanent collection, the Art Institute mounts more than 30 special exhibitions per year and features lectures, gallery tours, and special performances on a daily basis.