Castra Annamatia, Ancient Roman fortification in Baracs, Hungary.

Castra Annamatia is a Roman military fortification in Baracs featuring stone walls and foundations arranged in a rectangular layout on a strategic site near the Danube River. The remains reveal structures of guard towers and defensive installations that defined the perimeter of this garrison.

Roman forces established this fortification in the Pannonian region to control trade routes and defend against tribal crossings of the Danube during the empire's period of expansion. The garrison served as part of the military strategy protecting Rome's northern frontier.

The site's name, Annamatia, appears on the Tabula Peutingeriana, a late-antique road map. Finds include large amounts of Terra Sigillata pottery from the last decades of the 1st century AD and brick stamps of the Cohors VII Breucorum, the 7th cohort of the Breuci. Around 1850 Elek Fényes reported a Roman-style house found underground here with vessels, coins and images.

The archaeological site is accessible from Baracs village via marked pathways, with informational panels explaining the layout and military functions of the structures. The remains are best viewed in daylight when stone structures and foundations are clearly visible.

The north gate, built in the early 2nd century, has a zwinger-like outer enclosure that made Annamatia known among specialists. The site is named on the Tabula Peutingeriana, a late antique road map. The fort still rises 3 to 4 metres above the surrounding land.