COSI opened to the public on March 29,1964. That first day, an Easter Sunday, COSI welcomed more than 5,000 guests, who paid 50 cents for an adult and 25 cents for a youth admission.
After 35 years in Memorial Hall, COSI moved to its current location in downtown Columbus at 333 West Broad Street on November 6, 1999. Internationally renowned architect Arata Isozaki designed the 320,000 square foot building to showcase the future of COSI. Since 1964, COSI has welcomed more than 33 million visitors from all 50 states and numerous foreign countries.