High Quality Content by WIKIPEDIA articles! CN Tower is an office tower in Edmonton, Alberta, Canada. It stands at 111 metres (364 ft) or 26 storeys tall, and was built and formerly owned by the Canadian National Railway Company. At the time of its construction it was the first skyscraper in Edmonton, and the tallest building in Western Canada. Its reign as Edmonton`s tallest building lasted from 1966 to 1971.