Garrison of the Cohors I Breucorum between the year 90 AD and the end of the Limes around 260 AD. Knowledge of the fort and the vicus, situated to the south, go back to the investigations of the Reichs-Limeskommission (Winkelmann) between 1884 and 1900 together with construction observation in 1998 by the State Office for Monument Conservation when a high-pressure water pipe was laid.
The stone fort, with an area of 2.7 ha, has a nearly rectangular ground plan of 189 x 145 m, and was surrounded by two and in places three defence ditches cut in the limestone around the fort. The excavation finds indicate gate towers, corner towers and probably intermediate towers on the long sides.
The fort is situated in the Altkirchen-Feld area, on a spur of the hill south of the Altmühl. The vicus lay to the south of the fort. A burial ground has also been demonstrated by the arterial road there, and numerous uneven places in the neighbouring forest suggest human intervention. Further areas of the vicus are known in the valley of the Altmühl and in the region of the valley slope to the east and west of the fort. The slightly raised interior of the fort is, like the majority of the vicus, used for agricultural purposes. The course of the former Roman road has been built over for a length of c. 400 m from the modern road connecting Pfünz and Pietenfeld.
The western flank of the north wall and north gate are complete, the north-west wall and the west gate have been partly built up again, and the foundations of the tower at the south-east corner and the south gate have been reconstructed.
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