The time period when a property was associated with nationally significant events, activities, and persons is called the “the period of significance." Enter the dates for one or more periods of time when the property attained this national significance. Some periods of significance are as brief as one day or year while others span many, even thousands, of years.
Properties significant for architecture or engineering use the date of construction and/or the dates of any significant alterations and additions for the period of significance.
For archeologically significant properties, the period of significance is the period during which or about which archeological data will provide nationally significant information.
For properties nominated under criteria other than 6, the property must possess a high degree of historic integrity for all periods of national significance listed. Archeological integrity under Criterion 6 is based on information potential rather than on the seven aspects of historic integrity.
Examples of period of significance:
Ludlow Tent Colony Site , Period of Significance: 1913-1918
Stonewall Inn, Period of Significance: June 28, 1969 – July 3, 1969
The Miami Circle at Brickell Point Site, Period of Significance: 500 B.C.E.–A.D. 900; A.D. 1400–1513
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photograph by via Flickr
Ludlow Tent Colony Site, CO
Period of Significance: 1913-1918
In September 1913, coal miners and their families, evicted from company housing during a strike, moved into the Ludlow Tent Colony, a camp established by the United Mine Workers of America (UMWA) on vacant land strategically located near the entrances of two canyons leading to the mines and the small community of Ludlow, Colorado. After months of sporadic outbreaks of violence between strikers, company guards, and the Colorado National Guard, a day-long battle ensued at the Ludlow Tent Colony on April 20, 1914. The battle resulted in several deaths, including two women and eleven children who sought safety in a crude cellar located underneath one of the tents, and the destruction of the tent colony by fire. In 1918, the union erected a monument to those who died at Ludlow. Labor union members consider the site, which drew national attention.
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photograph by dbking via Flickr
Stonewall Inn, NY
Period of Significance: June 28, 1969 – July 3, 1969
The Stonewall Inn was the scene of important events that sparked the modern struggle for the civil rights of gay and lesbian Americans. In a pattern of raids and harassment of gay establishments, the New York City police raided the Stonewall Inn on the early morning of June 28, 1969. As employees and patrons of Stonewall were arrested, a riot erupted. Demonstrations and conflicts outside the inn continued until July 3, 1969. Stonewall is regarded by many as the single most important event that led to the modern gay and lesbian liberation movement.
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The Miami Circle at Brickell Point Site, FL
Period of Significance: 500 B.C.E.–A.D. 900; A.D. 1400–1513
The Miami Circle at Brickell Point Site contains early and late components of the primary village of the Tequesta people, who were one of the first Native North American groups encountered by Juan Ponce de Leon in 1513. The site possesses well-preserved evidence of American Indian architecture, considerable materials related to patterns of regional and long-distance exchange, elements of ceremonialism involving animal interments, and an association with the Tequesta people.
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