Despite pizza’s being around for hundreds of years in various forms, and since 1889 in it’s current form (crusts, sauce, and cheese), pizza apparently hadn’t hit in Canada as of 1957:
What is “nippy cheese”?
The header image shows Queen Margherita Maria Teresa Giovanna of Savoy – for which the Margherita Pizza was named after.
…and again, thank you Gary W. for tipping me off to this video.