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Arena deals have been made there, late night votes have changed how our city is run, and there's been the odd bridal photo taken or two.
Toronto Mayor Rob Ford just this past week even wanted a tour.
Later this month, the pyramids turn twenty, and the city is getting ready to mark the event.
Tuesday August 28th is the day and Jill Wright the client services manager there says there will be three special tours.
"The 2:00pm tour is really special because Gene Dub will lead that tour."
"Your going to hear right from the architect how the pyramids were built."
The other tours are at 10:00am and 7:00pm that day.
They'll feature all the public space that is in constant demand.
"We hold everything from concerts to a farmers market, so it allows the public to take ownership of the building. In 2011 we hosted just under 1,200 events," said Wright.
The next day, Wednesday the 29th, city council will honour those who helped build City Hall with a protocol item to kick off the regular council meeting. (sj/gb)