The Suncor Energy Centre, formerly the Petro-Canada Centre, is a 181,000-square-metre project composed of two granite and reflective glass-clad office towers of 32 floors and 52 floors, in the office core of downtown Calgary, Alberta. The Council on Tall Buildings and Urban Habitat lists the west tower, as the 23rd tallest building in Canada an…The Suncor Energy Centre, formerly the Petro-Canada Centre, is a 181,000-square-metre project composed of two granite and reflective glass-clad office towers of 32 floors and 52 floors, in the office core of downtown Calgary, Alberta. The Council on Tall Buildings and Urban Habitat lists the west tower, as the 23rd tallest building in Canada and the 6th tallest skyscraper outside of Toronto, as of 2023. The west tower overtook the Calgary Tower as the tallest free-standing structure in Calgary from its completion in 1984, until being surpassed by the neighbouring Bow in 2010. The office towers encompass 158,000 m² of rentable office space with the complex also containing 23,000 m² of retail and underground parking area. A glass-enclosed walkway provides shelter and easy access to the surrounding buildings.