It indicated the times and months of a year.
it was originally built to keep people out of london
Direct quote from the Wikipedia article on the structure... "...Its name "CN" originally referred to Canadian National, t he railway company that built the tower..."
The Eiffel Tower was originally built as the entrance arch to the 1889 World's Fair.
The 1889 World Fair
The world's oldest clock tower is believed to be the Tower of the Winds in Athens, Greece. It was built in the 1st century BC and features a water clock to tell time.
The porcelain tower of Nanking was originally built as place of worship for Buddhist priests. After so many repairs it came to simply be a national monument
Wikipedia has a comprehensive article on the building - including its history. See related link.
It's a building, a Tower. Originally intended as a bell Tower for a nearby Church. It's leaning b/c it was built on unstable soil.
"CN" originally meant "Canadian National", the rail transport company that built the tower in 1975.
The Foshay Tower was built in 1992.
The Foshay Tower was built in August, 1929.
When the Tower of London was built, there was no particular street that it was on but it is now on Tower Hill.