Howdy!
It appears that one of my favorite subjects is Armand Vaillancourt. I’ve written about him or his work here, here, here, here, here, here, and here.
So why not some more?
More information on Non titrée (square Saint-Louis) by Armand Vaillancourt can be found here and here.
More information on La Sainte Trinité by Armand Vaillancourt can be found here and here.
And apparently there is supposed to be a third sculpture by Armand Vaillancourt in Square Saint Louis as well, something called Hommage au Tiers-Monde.
Try as I might, I can’t find a darn thing about Écritures, a combination of it being an old sculpture, and a very common word.