Delaware Boundary Markers is a national historic district located on the State boundary lines between Delaware, Maryland, and Pennsylvania. The district includes 94 contributing sites along the Mason–Dixon line and includes the Transpeninsular Line, "Post Marked West" site, Mason–Dixon line, Tangent Line, The Arc, and The Twelve-Mile Circle.[2]
Delaware Boundary Markers | |
Mason–Dixon Monument, October 2011
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| Location | State boundary lines between DE-MD/DE-PA, Delaware |
|---|---|
| Area | 0 acres (0 ha) |
| Built | 1763 (1763) |
| Architect | Mason, Charles; Dixon, Jeremiah |
| NRHP reference No. | 75002101[1] |
| Added to NRHP | February 18, 1975 |
It was added to the National Register of Historic Places in 1975.[1]
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