Additional important websites for your inquiries about historic preservation...

NATIONAL:

• The National Register of Historic Places
•  National Trust For Historic Preservation
• National Park Service

STATE OF ILLINOIS:

• Landmarks Preservation Council of Illinois 
• Illinois State Historical Society 
• Illinois State Archives  
• Illinois Historic Preservation Agency 
• Illinois Association of Museums 
• Illinois State Genealogical Society 

McHENRY COUNTY:

• McHenry County Historical Society 
• McHenry County Historical Barn Preservation Association 
• Crystal Lake Historical Society