Here are five quick links to repositories of information and material concerning Ohio history:
National Register of Historic Places -- Independent website with individual and district listings on the National Register of Historic Places.
Ohio Historic Inventory, Butler County – Complete listing of Ohio Historic Inventory forms for Butler County, Ohio, including PDFs of each form.
Panoramic Maps in the Library of Congress Collection for Ohio communities, dating from 1847 to 1929.
Ohio Memory – An Online Scrapbook of Ohio History – Includes over 26,000 primary sources for 330 archival repositories, and presented by several organizations and institutions, including the Ohio Historical Society.
Encyclopedia of Cleveland History – the first complete online urban history encyclopedia.
Photo: Downtown Youngstown, from panoramic map of Youngstown, circa 1882/Public Domain

