When considering whether a property is eligible for listing on the National Register of Historic Places, a state register or through a local landmark designation program, those evaluating the property consider whether the property has sufficient, integrity. The National Park Service defines historic integrity as “the authenticity of a property’s historic identity, evidenced by the survival of physical characteristics that existed during the property’s prehistoric or historic period. Historic integrity is the composite of seven qualities: location, design, setting, materials, workmanship, feeling, and association. Historic integrity enables a property to illustrate significant aspects of its past. For this reason, it is an important qualification for National Register listing. Not only must a property resemble its historic appearance, but it must also retain physical materials, design features, and aspects of construction dating from the period when it attained significance. The integrity of archaeological resources is generally based on the degree to which remaining evidence can provide important information. All seven qualities do not need to be present for eligibility as long as the overall sense of past time and place is evident.”
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