The Olumuyiwa Benard Aliu ICAO Museum in Montréal’s ICAO Headquarters lobby presents the history and achievements of international civil aviation through exhibits on ICAO milestones, legal documents, public figures, and the organization’s past, present, and future priorities. The current ICAO visitor page lists public opening hours as Thursday and Friday, excluding holidays, from 12:00–16:00. Public access is limited to the operator’s current visitor schedule and holiday notices; all visitors must pass building security, including baggage X-ray and metal detection. Guided group tours of diplomatic chambers, gifted artwork, and model aircraft are available in English and French by advance reservation for eligible professional, organizational, or academic groups; participant names and government-issued photo identification are required, and tours may change or be cancelled. Address: ICAO Headquarters, 999 Boulevard Robert-Bourassa, Montréal, Québec H3C 5H7, Canada; confirm current opening days, holiday closures and security requirements before travel.