In 1812 the Pennsylvania State House in Philadelphia was threatened by demolition. Many believed that the building was in such a state of disrepair that it would be too costly to rehabilitate. The City of Philadelphia had drawn up plans to demolish the building and subdivide its parcel of land to sell to private developers. At the time, the building was not even 100 years old, and the city did not regard the building as a historically significant property. Thanks to the activism of local Philadelphians, the city was pressured into purchasing the entire city block to preserve the building that is now named Independence Hall. As the site where the Declaration of Independence and the United States Constitution were debated and adopted to be the foundations of a new democratic government, this building is arguably one of the most illustrious examples of the United States’ built history.
In 1848, another nationally significant building was facing the threat of demolition. Mount Vernon, the former mansion of President George Washington, was in the possession of his heirs who did not have the resources to continue keeping up the estate.
The
Antiquities Act of 1906
was the first historic preservation law to be passed in the United States. It established the right for the President of the United States to designate historic landmarks and other prehistoric and historic sites as significant resources in the country. Under the Antiquities
Act of 1906 heavy penalties could be imposed upon perpetrators who destroyed historic sites owned by the Federal Government. This new law
did prompt the surveying and identification of many historic sites, however, those owned by other government entities (such as state, county and city), private and not for profit organizations were left without protections under the Antiquities Act.
Under President Lyndon B. Johnson, the country’s top law regarding preservation, the
National Historic Preservation Act (NHPA)
, was passed in 1966. The NHPA deemed that all buildings in the United States older than 50 years shall be considered historic. The 50-year threshold is progressive, so each year, another group of buildings are also considered historic.