|CN Tower post card, circa 1977|
The CN Tower is one of Toronto's most recognizable architectural structures. Built by CN Rail and opened in 1976, the 553m (1815ft.) communication and observation tower is a major Toronto landmark and tourist attraction. In 1995, it was declared one of the modern Seven Wonders of the World by the American Society of Civil Engineers. When CN transferred ownership of the tower to the federal crown corporation Canada Lands in 1995, the tower's official name was changed to Canada's National Tower , but this name is not commonly used. The CN Tower was the highest freestanding structure in the world until 2007.
The World's Highest Post Office Cachet
The 1977 post card shown below shows that visitors were able to post mail at the top of the tower to which a souvenir cachet was applied. The author has no information relating to the posting system and would be interested in learning more about it (Please contact email@example.com).
|Toronto to Thalwil, Switzerland, September 14, 1977|
THE WORLD'S HIGHEST POST OFFICE