The Art Institute of Chicago in Chicago's Grant Park, founded in 1879, is one of the oldest and largest art museums in the world. Recognized for its curatorial efforts and popularity among visitors, the museum hosts approximately 1.5 million people annually. Its collection, stewarded by 11 curatorial departments, is encyclopedic, and includes iconic works such as Georges Seurat's A Sunday on La Grande Jatte, Pablo Picasso's The Old Guitarist, Edward Hopper's Nighthawks, and Grant Wood's American Gothic. Its permanent collection of nearly 300,000 works of art is augmented by more than 30 special exhibitions mounted yearly that illuminate aspects of the collection and present cutting-edge curatorial and scientific research. As a research institution, the Art Institute also has a conservation and conservation science department, five conservation laboratories, and one of the largest art history and architecture libraries in the country—the Ryerson and Burnham Libraries. The growth of the collection has warranted several additions to the museum's 1893 building, which was constructed for the World's Columbian Exposition. The most recent expansion, the Modern Wing designed by Renzo Piano, opened in 2009 and increased the museum's footprint to nearly one million square feet, making it the second-largest art museum in the United States, after the Metropolitan Museum of Art. The Art Institute is associated with the School of the Art Institute of Chicago, a leading art school, making it one of the few remaining unified arts institutions in the United States. In 2017, the Art Institute received 1,619,316 visitors, and was the 35th most-visited art museum in the world. However, in 2020, due to the COVID-19 pandemic, the museum was closed for 169 days, and attendance plunged by 78 percent from 2019, to 365,660. History In 1866, a group of 35 artists founded the Chicago Academy of Design in a studio on Dearborn Street, with the intent to run a free school with its own art gallery. The organization was modeled after European art academies, such as the Royal Academy, with Academicians and Associate Academicians. The academy's charter was granted in March 1867. Classes started in 1868, meeting every day at a cost of $10 per month. The academy's success enabled it to build a new home for the school, a five-story stone building on 66 West Adams Street, which opened on November 22, 1870. When the Great Chicago Fire destroyed the building in 1871 the academy was thrown into debt. Attempts