Burg Arnsburg: A Ruined Medieval Castle in Germany
Site at a Glance
- Rating
- 4.4
- Popularity
- Very Low
- Country
- Germany
- Primary era
- Medieval
- External website
- Open
- Eras represented
- Medieval
- Civilizations
- Holy Roman Empire
- Site type
- Military
- Remains
- Castle
On this page12 sections
History
Burg Arnsburg is a ruined medieval castle in Germany, near Kloster Arnsburg in Lich, Hesse. Built around AD 1000, it became the ancestral seat of the imperial ministeriales of Hagen and Arnsburg, a medieval service nobility whose members held military or administrative responsibilities for powerful lords. By 1151, the family had adopted the name von Münzenberg. The castle’s history reflects the reuse of a landscape shaped first by Roman military occupation and later by medieval estates and monasteries.
Roman and Frankish Foundations
The castle stands near the former Roman fort of Arnsburg-Alteburg, which existed during the reign of Emperor Hadrian. The Roman frontier system in the region, known as the Limes, was abandoned around AD 250–260. Its withdrawal removed the military framework that had supported the fort, which gradually declined. The Wetterau was subsequently settled by the Franks.
By around AD 800, settlements had developed along former Roman military roads. Some occupied former fort sites, while former Roman fiscal lands were systematically surveyed and royal estates became concentrated in the area. Two castles were established successively near the abandoned fort on the steep bank of the Wetter. The smaller predecessor stood in the northwestern part of the later Kloster Arnsburg grounds and dates to around AD 800. Its last remains were mentioned in 1834, although none are now visible.
The Hagen and Arnsburg Family
The later Burg Arnsburg probably began around AD 1000. Kuno von Arnsburg supported Henry III, the German king and Holy Roman Emperor of the eleventh century. In 1064, Kuno married Countess Mathilde von Beilstein. Their heiress, Gertrud von Arnsburg, married Eberhard von Hagen of Dreieich. The couple chose Arnsburg as their residence and took the name von Hagen und Arnsburg.
The castle’s name has several proposed explanations. It may mean “Arn’s Castle” or “Arnold’s Castle.” Another interpretation connects it with Castellum Hadrianum, the nearby Roman fort associated with Emperor Hadrian. A more likely explanation links the name with the Roman legionary eagle. Kuno retained the eagle as his heraldic emblem in recognition of service under two emperors.
Transfer to Münzenberg and Monastic Reuse
By 1151, the castle had reached its final form through four construction phases. In the same year, Kuno’s grandson Konrad II and his wife Luitgart founded the Benedictine monastery of Altenburg on the site of the former Roman fort. Benedictines followed the Rule of Saint Benedict, a framework for monastic life. The monastery belonged to Fulda Abbey, which granted the uninhabited Münzenberg to the couple in exchange. After 1156, the family moved its ancestral seat to the newly built Münzenberg Castle.
With the owners’ permission, the monks took stone from the Roman fort for their church and later removed material from the abandoned Burg Arnsburg. These activities severely damaged the castle remains. Construction at the Benedictine monastery ended in 1174, and the monastery was probably dissolved after the Hagen-Arnsburg family’s financial difficulties curtailed its support.
The family then transferred Burg Arnsburg and all its lands to Eberbach Abbey for the foundation of a new Cistercian monastery in the nearby river valley. The Cistercians were a Western Christian reform order associated with stricter observance and a more austere monastic ideal. The castle was again used as a quarry, and windblown sand later covered much of what remained.
Later Destruction and Archaeological Rediscovery
More than two centuries later, material from the castle was used for the Chapel of the Holy Cross, consecrated in 1399. The small church served regular pilgrimages until it was destroyed in 1623 during the Thirty Years’ War, the major European conflict fought from 1618 to 1648.
Burg Arnsburg came to light through aerial archaeology in the early 1980s, during searches for predecessor camps associated with the Roman fort. Dietwulf Baatz, then director of the Saalburg Museum, made the discovery. Excavations by the Hessian State Office for Monument Preservation, under state archaeologist Fritz-Rudolf Herrmann, revealed an extensive buried wall system in addition to the already known chapel.
Excavations initiated by Hans Rempel, chairman of the Friends of Kloster Arnsburg, began in 1984 and exposed the foundations of both Burg Arnsburg and the Chapel of the Holy Cross. In 1985, the foundations were secured and rebuilt above ground level. The surviving layout has remained visible since then.
Remains
Castle Layout and Defensive Works
Burg Arnsburg occupies a projecting spur about 170 metres above sea level, roughly 800 metres southwest of the former Kloster Arnsburg. The excavated area lies 17 metres above the Wetter River, which curves below the site. A steep slope descends toward the river, while the castle’s defensive works enclosed the elevated spur.
First Tower Castle
The earliest castle phase, dating to around AD 1000, formed a tower castle above the steep slope. A square tower stood inside a wall that enclosed a narrow courtyard. In the courtyard’s southern corner was a 17-metre-deep well made with stones laid without mortar. It reached the groundwater level of the Wetter. A small chapel stood east of the tower complex.
Expanded Enclosure
The second phase added another wall and a dry neck ditch, a ditch cut across the landward approach to a projecting spur. The ditch curved around the chapel on its eastern side. In the third phase, a pillar-supported structure was built immediately east of the tower castle. The castle wall was extended toward the northeast, and a fortified gate was incorporated about 40 metres northeast of the tower. The ditch in front of the chapel was filled during this phase.
Final Medieval Expansion
The fourth phase added a new curtain wall, meaning an enclosing defensive wall. In the central area, it stood directly in front of the older wall and continued northeast toward the steep drop above the Wetter. This brought the whole spur within the castle enclosure. A circular bergfried, the principal defensive tower used mainly for defense and refuge, was built in the northeastern part of the site at the same time.
Later Alterations and Monastic Quarrying
Further building activity followed several years after the final medieval expansion. Later wall sections cut across the castle’s curtain wall, showing that the site was altered after its main construction phases. Between the foundation of the nearby Cistercian monastery in 1174 and the consecration of its new complex in 1197, the castle remains probably served the monks as a building workshop and quarry.
The castle was constructed principally of rubble masonry and now survives as a ruin with exposed foundations. Excavation revealed the buried wall system and the foundations of the castle’s successive enclosures, towers, gate, well, chapel, and other structures. The foundations were consolidated and raised above ground level in 1985, making the physical organization of the castle visible.
Chapel and Roman Archaeological Setting
The foundations of the Chapel of the Holy Cross were exposed beneath the ground alongside those of Burg Arnsburg. The chapel was consecrated in 1399 and later destroyed during the Thirty Years’ War. Its surviving foundations form part of the excavated remains.
The Roman fort of Arnsburg-Alteburg lies about 600 metres southwest of the castle. Apart from visible foundation remains, the fort survives as an archaeological ground monument. Stone from the fort and from Burg Arnsburg was reused in the construction of the nearby Benedictine monastery, linking the Roman, medieval castle, and monastic phases of the site’s physical history.
Nearby sites
