Chronology of Antietam
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1830s | Sherrick House built. Piper House built. |
| 1836 | Burnside Bridge built. | |
| 1844 | Pry House built (not fully documented). | |
| 1852 | Original Dunker Church built. | |
| 1865 | March 23--State of Maryland established Antietam National Cemetery. | |
| 1866 | Stone wall completed around National Cemetery. | |
| 1867 | Iron fence and gate completed around National Cemetery. | |
| 1867 | Cemetery Lodge House completed. | |
| 1880 | September 17--U.S. Soldier Statue at National Cemetery dedicated (cornerstone laid 1867). | |
| 1890 | August 30--Antietam National Battlefield established (second Civil War park established in country). Administered by War Department. | |
| 1896 | Observation Tower was built under the administration of the War Department (Engineer Lamont). | |
| 1896-98 | Gathland--War Correspondent's Memorial Arch-- built by George Alfred Townsend. | |
| 1900 | May 30--Maryland Monument dedicated. | |
| 1903 | McKinley Monument dedicated. | |
| 1920 | New York Monument dedicated. | |
| 1921 | May--Dunker Church destroyed by wind and hailstorm. | |
| 1933 | Antietam National Battlefield transferred from U.S. Army to National Park Service. | |
| 1961-62 | Dunker Church rebuilt. | |
| 1962 | Visitor Center completed. | |
| 1997 | Virtual Visitors' Center opened (September 12) on the Internet. |
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