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10 May 1775
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Second Continental Congress
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14 Jun 1777
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Second Continental Congress approves the Stars and Stripes
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19 Dec 1777
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Continental Army endures bitter cold and hardship at Valley Forge
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9 Mar 1983
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Boundary Increase of Cashiers House and Coach House
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21 Jun 1984
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Boundary Increase II of Lancaster Historic District
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28 Oct 1986
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Boundary Increase: North and South Extensions of Newtown Historic District
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30 Jul 1987
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Boundary Increase of Kimberton Historic District
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27 Feb 2005
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Boundary Increase of West Chester Historic District
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4 Sep 2008
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Boundary Increase of Mexican War Streets Historic District
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30 Jan 2012
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Boundary Increase II of Mexican War Streets Historic District
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12 Jan 2016
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Albion Carpet Mill listed on NRHP
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2 Feb 2016
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Boundary Increase of Plantation Plenty
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25 Apr 2016
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Hotel Lykens listed on NRHP
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5 Jul 2016
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Times Finishing Works listed on NRHP
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19 Feb 2021
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Mount Tabor AME Zion Church and Cemetery listed on the National Register of Historic Places
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6 May 2021
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Washington Commercial Historic District listed on the National Register of Historic Places
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21 Dec 2021
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Locust Grove Cemetery listed on the National Register of Historic Places
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24 Jan 2022
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Brooklawn listed on the National Register of Historic Places
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11 Apr 2022
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MIS of Mary Immaculate Seminary
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20 Oct 2022
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Cameron County Courthouse listed on the National Register of Historic Places
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2 Feb 2023
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Mellon Park listed on the National Register of Historic Places
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27 Feb 2023
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Blumenthal Brothers Chocolate Factory listed on the National Register of Historic Places
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27 Feb 2023
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Lehigh Valley Transit Station listed on the National Register of Historic Places
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27 Feb 2023
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Zion Baptist Church and Educational Annex listed on the National Register of Historic Places
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27 Apr 2023
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S.L. Allen & Company Building listed on the National Register of Historic Places
