The Bertradaburg is a ruined hill castle on a rock spur above the village of Mürlenbach in the county of Vulkaneifel. The castle was built on the remains of a Roman castrum, which probably guarded the Roman road from Trier to Cologne. In the castle, according to local tradition, Bertrada, the mother of Charlemagne is said to have lived which implies that his birth was around 747 AD. The existence of the castle is first recorded in the 13th century when it is mentioned as a state fortress of the princely imperial abbey of Prüm (c.f. the Middle Rhine Register or Mittelrheinisches Urkundenbuch), archaeological finds have indicated that there were earlier fortifications on the site.
After Prüm Abbey was occupied and damaged by French Revolutionary troops from 1794 to 1802, Mürlenbach's castle was seized as part of the forced secularisation of the abbey estate and auctioned by France to a private owner.
In the late 20th century, the surviving castle walls and buildings were restored by the Tiepelmann family and the state-owned, 30-metre-high, ruined double tower gate was rebuilt with state finance. In 2009, the nine owners were given a grant from the federal and state budgets to secure and maintain the 16th-century, five-metre-thick, southwest roundel. The 13th-century shield wall was also renovated with funding from the state of Rhineland-Palatinate.
The 30-metre-high tower house, the double tower gateway of the Betradaburg, is visible from a long way off. It has good views of the surrounding countryside and may be visited as part of a guided tour. Every year the Mürlenbach Castle Festival (Mürlenbacher Burgfest) takes place. The castle is privately owned and has holiday apartments which are currently being renovated.
References:Saint-Émilion is a picturesque medieval village renowned for its well-preserved architecture and vineyards. The town and surrounding vineyards was made a UNESCO World Heritage Site in 1999, owing to its long, living history of wine-making, Romanesque churches and ruins stretching all along steep and narrow streets.
An oppidum was built on the hill overlooking the present-day city in Gaulish times, before the regions was annexed by Augustus in 27 BC. The Romans planted vineyards in what was to become Saint-Émilion as early as the 2nd century. In the 4th century, the Latin poet Ausonius lauded the fruit of the bountiful vine.
Because the region was located on the route of the Camino de Santiago, many monasteries and churches were built during the Middle Ages, and in 1199, while under Plantagenet rule, the town was granted full rights.