One of the jewels of Navy Pier is the historic Aon Grand Ballroom. Part of the Pier’s original 1916 construction and reminiscent of an era of elegance and splendor, the 18,000 square foot Aon Grand Ballroom embodies the magnificence of the past with all the amenities and services of the present. With a sweeping 80-foot domed ceiling and panoramic views of the lakefront, the Aon Grand Ballroom capitalizes on timeless architecture and the beauty of Chicago and the city itself. The Aon Grand Ballroom can hold up to 1,100 for dinner with additional seating for 300 in the balcony above. It provides a stunning setting for any event.