Castellum Mattiacorum, Roman military fortress in Mainz-Kastel, Germany
Castellum Mattiacorum was a Roman military fortress on the right bank of the Rhine, featuring a stone structure roughly 70 by 100 meters in size. The camp was surrounded by additional buildings, including storage facilities, workshops, and quarters for soldiers and administrative staff.
Romans built the initial fortress around 11 BCE when establishing a temporary Rhine crossing to expand eastward. The site then developed into a permanent military station and underwent several expansions, particularly in the 3rd century with reinforced defensive structures.
This location served as a key hub for Rhine control and managing Roman power along the frontier. People gathered here for trade, military operations, and the exchange between Roman and local communities.
The Castellum Museum in Mainz-Kastel displays finds from excavations, including everyday objects, weapons, and coins that document life at the garrison. It is the best place to understand the site's history and explore the Roman past through recovered artifacts.
Excavations in 1986 uncovered the base of a Roman triumphal arch, suggesting ceremonial connections to military campaigns in Germanic territories. This find indicates the site was not merely a military camp but also a symbolically important station for Roman power displays.
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