Milecastle 3 shown within Tyne and Wear
|OS grid reference||NZ26406466|
|List of places: UK • England • Tyne and Wear|
|This article is part of the series on:
Military of ancient Rome (portal)
753 BC – AD erals
|Roman navy (fleets, admirals)|
|Lists of wars and battles|
|Decorations and punishments|
|Military engineering (castra, siege engines, arches, roads)|
|Strategy and tactics|
|Frontiers and fortifications (limes, Hadrian's Wall)|
Excavations and investigations 
- 1789 - Brand visited the site, but noted that many of the stones had been removed from the foundations some years previously, for use in the building of an adjoining house.
- 1848 - Collingwood Briuce reported that a small, partly illegible altar had been found close to the presumed site of the milecastle. The altar (NMR Number: NZ 26 SE 227) was dedicated by Julius Maximus. Having searched the area, he could find no trace of Roman remains.
- 1928 - FG Simpson measured the distance from Milecastle 2 to Milecastle 3 as 1,450 yards (1,330 m).
- 1979 - Exploratory trenches were sunk during the building of the Metro, revealing no trace of the milecastle.
Associated Turrets 
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 3 are known as Turret 3A and Turret 3B.
Turret 3A 
Nothing is known of Turret 3A.
Turret 3B 
Nothing is known of Turret 3B.
Monument Records 
|Monument||Monument Number||National Monuments Record Number|
|Milecastle 3||24904||NZ 26 SE 15|
|Turret 3A||24907||NZ 26 SE 16|
|Turret 3B||24912||NZ 26 SE 17|
- Breeze, David J (1934), Handbook to the Roman Wall (14th Revised edition - Nov 2006), Society of Antiquaries of Newcastle upon Tyne, ISBN 0-901082-65-1
- Horsley, John (1732), Britannia Romana or the Roman Antiquities of Britain, Frank Graham (published 1974), ISBN 0-85983-090-X
- Stukeley, William (1776). Itinerarium Curiosum: or, An account of the antiquities, and remarkable curiosities in nature or art, observed in travels through Great Britain (2nd ed.). London: Baker & Leigh. ISBN 0-576-19312-7.
- Brand, John (1st Jan 1789). The History and Antiquities of Newcastle upon Tyne. Vol 1 (1st ed.). B White & Son. p. 138.
- "Milecastle 3". Pastscape. English Heritage. Retrieved 24 May 2010.
- "Turret 3A". Pastscape. English Heritage. Retrieved 24 May 2010.
- "Turret 3B". Pastscape. English Heritage. Retrieved 24 May 2010.
- Daniels, Charles (1979), "Review: Fact and Theory on Hadrian's Wall", Britannia 10: 357–364, JSTOR 526069