Castra Vetus Salina, Roman military fortress in Adony, Hungary
Castra Vetus Salina was a Roman military fortress on the eastern bank of the Danube River in present-day Adony. The stone walls and defensive structures once marked the empire's northern frontier along the river.
The fortress began as a wooden camp between 88 and 92 AD and was later rebuilt in stone under Emperor Hadrian in the 2nd century. This transformation reflected Rome's strategy to permanently secure its frontier regions.
The site reveals pottery and coins from Roman times that show how this frontier post connected with distant parts of the empire. Objects from Emperor Claudius's era especially tell stories of trade routes and the daily life of soldiers stationed here.
Visits focus on the southwest corner of the fortification, where excavations are most advanced. It helps to know that large portions of the original structure have been lost to erosion, particularly from movements of Danube tributaries.
An altar was discovered on the grounds dedicated to Den Vagdavercustis, a deity worshipped by the cohort III Batavorum stationed here. This find shows how soldiers maintained their own religious traditions at this remote outpost.
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