praised by industry officials as an "amazing feat of technical and physical workmanship". Upon completion, the Husky Tower stood tall and was the tallest structure of its type in North America. It dominated the Calgary skyline, standing well over twice the height of the previous tallest structure in the city, Elveden House. Developers deliberately misled the public, claiming the tower would stand , in the hopes of preventing competing developers from surpassing the Husky Tower's height record. Shortly after officials in San Antonio, Texas attempted to claim the record in announcing the completion of the Tower of the Americas, developers revealed the Husky Tower's true height. The Husky Tower officially opened on June 28–30, 1968, in three separate ceremonies. The observation level featured a lounge/restaurant called the Hitching Post. Later history Marathon Realty acquired a controlling interest in the tower in 1970. The structure was formally renamed the Calgary Tower on November 1, 1971 as a tribute to the citizens of the city. It is still called the Husky Tower by airport officials, however, to distinguish it from the tower at the Calgary International Airport. The Petro-Canada Centre's west tower overtook the Calgary Tower as the tallest structure in Calgary in 1983. The tower underwent significant renovations between 1987 and 1990. The addition of a souvenir shop and a revolving restaurant were part of a $2.4 million refurbishment of the upper levels of the tower. In 1990 a glass rotunda to serve as the new lobby was added. A natural gas-fired cauldron was constructed at the top of the tower by Canadian Western Natural Gas in October 1987 as a gift to celebrate the 1988 Winter Olympics. The torch, which consumes per hour, was first lit on February 13, 1988 when the Games opened, and burned 24 hours a day throughout. It continues to be reignited for various special events, including Canada Day. The tower was a founding member of the World Federation of Great Towers in 1989 along with the Eiffel Tower, among others. It celebrated its 25th anniversary in 1993, a year in which it topped 500,000 visitors for the first time. A glass floor extension was constructed on the north side of the tower's observation deck and opened on June 24, 2005. When standing on the glass, one can look straight down on 9th Avenue South and Centre Street. An LED, multicolour exterior lighting system was added