Milecastle 12
| Milecastle 12 | |
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The curtain wall in Heddon-on-the-Wall (east of Milecastle 12)
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 Milecastle 12
 Milecastle 12 shown within Northumberland |
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| OS grid reference | NZ135669 |
| Coordinates | 54°59′48″N 1°47′23″W / 54.996768°N 1.789811°WCoordinates: 54°59′48″N 1°47′23″W / 54.996768°N 1.789811°W |
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Milecastle 12 (Heddon) was a milecastle of the Roman Hadrian's Wall. Its remains lay under Town Farm, Heddon-on-the-Wall, (just opposite the farm house) with nothing visible on the surface.
Milecastle 12 is of unknown axis and gateway types.
Each milecastle on Hadrian's Wall had two associated turret structures. These turrets were positioned approximately one-third and two-thirds of a Roman mile to the west of the Milecastle, and would probably have been manned by part of the milecastle's garrison. The turrets associated with Milecastle 12 are known as Turret 12A and Turret 12B.
Turret 12A (Heddon West) is located beside (and mainly beneath) the B6318 Military Road a short distance West North West of Heddon-on-the-Wall. No surface traces are currently visible.
The turret was located in 1928 as 548 yards (501 m) west of Milecastle 12. This location was confirmed by a partial excavation in 1930. It was found that the walls were reduced to ground level beyond the edge of the roadway, but had the same plan as Turret 12B. However, the platform (which occupied the South side of the interior of Turrets 12B and 13A), was too badly robbed for any trace to remain. The mortared walls were recorded as 1.22 metres (4.0 ft) thick, with the doorway lying to the east.
Location on Ordnance Survey 1:25 000 map: 54°59′53″N 1°47′51″W / 54.998174°N 1.797620°W
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