A 28-storey Brutalist tower that hosted the signing of the Montreal Protocol, one of history’s most successful environmental agreements.
At a glance
Standing 128 metres on Sherbrooke Street West in downtown Montreal, this concrete and glass skyscraper exemplifies Brutalist design of the early 1970s. The building once served as headquarters for the International Civil Aviation Organization and remains significant for the landmark environmental treaty negotiated within its walls.
History
Designed by Rosen Caruso Vecsei Architects, the tower was completed in 1974 and initially housed the headquarters of the International Civil Aviation Organization (ICAO). In 1987, the building became the venue for one of the defining moments in environmental diplomacy: the signing of the Montreal Protocol, a multinational agreement to phase out ozone-depleting substances. This treaty is widely recognized as the most effective international environmental accord ever negotiated.
What you see
The structure exemplifies Brutalism with its bold concrete expression and integrated glass facade. The 28-storey volume creates a distinctive presence on the downtown skyline, positioned next to Tour Scotia. The Centre Mont-Royal conference center occupies space within the building.
Cultural significance
The building’s historical importance derives largely from the Montreal Protocol’s negotiation and signing. That agreement set a precedent for international cooperation on environmental crises and demonstrated the possibility of global consensus on scientific evidence. The treaty’s success in reducing ozone-layer damage established a model for tackling planetary-scale environmental challenges.
Key facts
- Country: Canada
- City: Montreal
- Height: 128 metres (420 feet)
- Storeys: 28
- Completed: 1974
- Architects: Rosen Caruso Vecsei Architects
- Style: Brutalist
- Coordinates: 45.5027, −73.5751
Practical information & getting there
The building is located at 1000 rue Sherbrooke Ouest in downtown Montreal, opposite McTavish Street. The Centre Mont-Royal conference center on site may offer public programming. Check ahead for access details and any exhibitions related to the building’s architectural or historical significance.
Sources & resources
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