Today while blindly browsing teh interwebs I came across the Armstrong, Beere and Hime Panorama which is a set of the earliest know photos of Toronto forming a panorama of the city as it was in 1856 from the corner of King and York. I love seeing old pictures of the city because you can see landmarks that are still around today and it's neat to see how things have changed around them. In this panorama in particular you can spot Osgoode Hall, St. Lawrence Hall, and St. James Cathedral (before its spire was built!). It's amazing how different the city was back then.
You can read more about the panorama at the City of Toronto Archives. They also have a map of the city from the year the photos were taken. It's bounded by Bloor in the north, Strachan in the west and the Don Valley in the east. Toronto was so small back then!