Years after naming my child for my grandfather did I learn that it was an Anglicization of his real name. Not so long ago people with ethnic surnames were encouraged to anglicize them so they would fit in better in Canada. Canadian spelling is legitimate, but finding a single authoritative authority (as evidenced by many of the the previous comments) the differences between what we were taught in school and the American spellings used by our media have left many of us even more confused. I actually found my way here because I'm a Canadian writer self publishing my first novel, and I want the spelling to be Canadian. But like Wendy, I've long held a suspicion that the Arts Centre was spelled differently than the one in the middle. Glad to have that one cleared up. :)