You can find The Secret Bench of Knowledge on Wellington Street in front of the National Archives and Library. It is one of many. Artist Lea Vivot has the story about the sculpture on her 
web site.
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The Secret Bench of Knowledge 
by Lea Vivot 
Donated by Eugene Boccia, Toronto 
May 1, 1991 | 
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| I have no idea how this structure over this grate relates to the sculpture of the two people on the bench. The plaque for the sculpture is beside it quite a distance from the sculpture it names, so I photographed it. |