The Donald E. Stephens Convention Center, formerly known as the Rosemont/O'Hare Exposition Center, is a convention center located in Rosemont, Illinois, a suburb of Chicago. Built in 1975, the center has exhibition space of 840000 sqft and parking available via a Skybridge connected parking garage, which is able to accommodate 8,000 vehicles. It is located near O'Hare International Airport, Allstate Arena, Rosemont Theatre, and Fashion Outlets of Chicago. The facility is named after the late mayor of Rosemont, Donald E. Stephens. Notable events held annually include: The American Numismatic Association held their annual "World's Fair of Money" here in 1991, 1999, 2011, 2013, 2014, 2015, 2019, 2021 and 2022.