Burg Kreuzberg, Medieval castle in Rhineland-Palatinate, Germany

Burg Kreuzberg is a hill castle on a small triangular rock plateau above the Altenahr district of Kreuzberg. Its core is enclosed by a ring wall, with a two-storey baroque residential building of broken stone on the north side and a round, white-rendered bergfried with a blunt conical helm topped by a weather vane dated 1781. A late-baroque chapel and 18th-century farm buildings lie west of the main castle.

Kreuzberg was first recorded as Cruceberg in 893 in the Prüm Urbar. Around 1100 the settlement passed to the Counts of Are, who built a first residence for an administrator. Archbishop Konrad von Are-Hochstaden enfeoffed Kuno von Vischenich with Kreuzberg and allowed him to build a castle, which Kuno and his wife Guda enfeoffed to the Archbishopric of Cologne in April 1343. In 1686 French troops destroyed the castle; the residential building was rebuilt in 1760.

The castle chapel, dedicated to Saint Anthony, is the only part open to the public; its late-Baroque interior has a wooden barrel vault and a west gallery bearing the coat of arms of the von der Heyden family, called Belderbusch, dated 1783. The name Kreuzberg derives from Cruceberg, first recorded in 893 in the Prüm Abbey's land register.

Burg Kreuzberg is private property and, apart from the castle chapel, not open to the public. The chapel, dedicated to Saint Anthony, is the only part visitors can enter. The site lies above the Kreuzberg district of Altenahr; access to the chapel should be arranged in advance.

The white-plastered bergfried on the east side juts about halfway out of the inner ring wall; its blunt conical helm carries a weather vane dated 1781. Art-history literature often dates the tower to the 15th century, but it may be the oldest part of the complex, from the 14th century. It guarded the entrance gate to the inner courtyard.