The World Exchange Plaza is an office and retail complex in Downtown Ottawa, Ontario, Canada. Consisting of two towers and an outdoor plaza, it covers an entire city block between Metcalfe and O'Connor Streets south of Queen and north of Albert Street. The first phase of the project was completed in 1991. At the time, the twenty-story building was unusual in Ottawa for its visual flair. The eastern side was marked by a large plaza modeled after the Roman Colosseum.