Are you interested in Landscape Architecture???
Beginning in the late 1800’s and on into the 1900’s, Olmsted, Sr created dozens of designs for universities campuses, parks and more. His sons and other partners eventually continued the firm to 2000.
Today, you can visit the Frederick Law Olmsted National Historic Site located in Brookline, MA which is just outside of Boston. The Fairsted is open for guided tours and researchers can make appointments to see the original design records.
Here is a map by project type of the National Parks, College Campuses, Cities and Estates that benefited from their work.
And, yes, Ohio State University is on the list.
These records are from 1905 – 1911. Also, visit University Archives for more campus maps.