German Village Society  and German Village Guidelines 
www.germanvillage.com

Italian Village Society and Victorian Village Society
 www.geocities.com/nnhist_dist/  

Ohio Historical Society
http://www.ohiohistory.org

Ohio Historic Preservation Office
www.ohiohistory.org/resources/histpres

Ohio Sanborn Fire Insurance Maps
www.oplin.lib.oh.us/products/SanbornMaps/index.cfm

National Trust for Historic Preservation
www.nthp.org

National Park Service
www.cr.nps.gov

National Alliance of Preservation Commissions
www.arches.uga.edu/~nap

 Related Columbus City Codes

Historic Preservation Code - Chapter 3119