and J.P. Gillam in 1950, it is the second-most northernly mithraeum discovered so far – only Bremenium (High Rochester), more than ten miles from Brocolitia, is further north. The Brocolitia mithraeum is also the only sanctuary outside the Rhine provinces from which a monument of the goddess Vagdavercustis has been recovered. Like most other mithraea, the Brocolitia temple was built to resemble a cave, and also had the usual anteroom, and a nave with raised benches (podia) along the sides. At Brocolitia, the anteroom and nave were separated by a wattle-work screen, the base of which was found exceptionally well preserved. Excavations revealed three stages of development: the first stage was small, around 5.5 metres wide and 8 metres long. The building was expanded to 11 metres length in a second stage, at which time the temple also gained elaborate furnishings and extensive woodwork. This second stage existed for the entire 3rd century, and included at least two major renovations. The second stage was looted and the furnishings destroyed around 296–297 AD, but the sanctuary itself and the stone monuments remained intact, and the temple was re-equipped in a third stage shortly thereafter. The third stage includes three monuments by different cohort prefects, commanders of Cohors I Batavorum, a Roman Batavi unit of auxiliary cavalry stationed at Brocolitia. All three date to the 3rd century. The youngest coin found on the premises was a freshly-minted follis of Maximian (r. 296–308). This coincides with the third structural period on Hadrian's Wall (297–367), but the complete lack of coins from after 308 suggests that the temple did not remain in use for much of the 4th century. The temple was deliberately desecrated by the removal of the primary tauroctony scene, only a piece of which was found. Other than a collapsed roof, the temple was found almost exactly as the Romans had left it. The foundations of the temple are still visible, as are the wooden stakes on which the podia benches were raised. A reconstruction of the sanctuary is on display at the Great North Museum in Newcastle upon Tyne. Directly in front of the entrance to the mithraeum the remains of an apse, well, and altar were found and named as the Shrine to the Nymphs and Genius Loci, sometimes referred to as a "nymphaeum". Found in 1957 and excavated in 1960, this was the least used temple at Carrawburgh.