The impressive 280,000 square-foot state-of-the-art facility offers affordable, flexible space and in-house services to make the planning and coordinating of your event a breeze. With a beautiful 2,500-seat Auditorium, a spacious 38,000 square-foot Exhibit Hall, 14,000 square-feet of elegant Ballroom space, and 12 flexible 1,000 square-foot Meeting Rooms, The Old National Events Plaza can host a variety of events ranging from 20 to 4,000.