OU Sooner Heritage has some great old photographs. They are pretty small but the prairie has changed over the last hundred years.
Downtown Norman, notice the soutwestern influences in the architecture.
This is kind of cool. This is the Carnegie building, c. 1900
The third floor is the current home of OU's Landscape Architecture program, and the two studios are the two wings one to the south and one to the north. It looks like small trees at best with just cattle paths. These photos are for sale, I just might have to purchase this one for posterity.
The Boulevard to the University, I assume University Boulevard.