Suncor Energy Centre, Office skyscraper in downtown Calgary, Canada.

The Suncor Energy Centre is a two-tower office complex in downtown Calgary, with a 32-storey east tower and a 52-storey west tower rising 215 metres. Both are clad in Finnish granite and reflective glass. A glass-enclosed walkway links the towers to the +15 skywalk system, and the complex includes 158,000 square metres of rentable office space plus retail and underground parking.

Planning began in the late 1970s after Petro-Canada's creation, and construction started on 2 April 1982. The west tower passed the Calgary Tower on 4 January 1983 and was topped off that May; the complex was finished in 1984. Petro-Canada sold its remaining half interest to Gentra Inc. in December 1998 for $200 million.

The complex reflects Calgary's role as a center for the energy industry, housing major corporations like Suncor Energy. The buildings shape the downtown skyline and show how important this sector is to the city.

The two towers are linked to surrounding blocks by a glass-enclosed walkway that is part of Calgary's +15 system, so pedestrians can move between buildings without going outside. The complex also holds 23,000 m2 of retail space and underground parking. A $90 million redevelopment begun in 2025 adds a fitness centre, tenant lounge and a 400-seat amphitheatre with an exterior terrace, due for completion in 2027.

The Finnish granite cladding was cut and polished in Italy before shipping to Calgary, after no Canadian firm bid on the contract. Petro-Canada also insisted on bilingual French and English signage, which stirred local controversy during construction.