Untere Burg, Medieval castle ruin in Rheinbreitbach, Germany

Untere Burg is a castle ruin in Rheinbreitbach with foundation walls rising about one meter high, positioned next to Saint Maria Magdalena Church. The site displays restored stonework and traces of a medieval moat surrounding the former stronghold.

The castle served as the ancestral seat of the Lords of Breitbach until 1473, when they relocated to Bürresheim Castle near Mayen. This move marked the end of their presence at the original location.

The exposed foundations were laid bare between late 2006 and spring 2009 during a park-like redesign of the grounds, which took the name Renesse-Platz after the family that held the castle from 1797. The walls were restored as dry-stone masonry so they could remain visible as a protected archaeological monument.

The site sits along Westerwaldstraße in central Rheinbreitbach and is easy to reach on foot. Visitors can examine the foundation walls and moat reconstruction freely, making it simple to explore at their own pace without special equipment.

The round-arched gate in the surviving stretch of the perimeter wall, opposite the church, carries a coat of arms with the chain of the Bavarian Order of St. Michael. It identifies Freiherr Franz Ludwig Anselm von Breidbach-Bürresheim (1718–1796), a senior Cologne electoral official.