Paul WenzlaffHardburg Water Castle Ruins
Hardtburg Castle is the well-preserved ruin of a moated castle dating from the High Middle Ages; it is located in the Hardtwald forest, south of the Stotzheim district of Euskirchen on the northern edge of the Eifel.
Due to damage to the castle itself and to the visitor bridge, access to the castle has been closed since 2015 (as of July 2025). Assessments are currently underway to determine whether and how safety, in conjunction with nature conservation, and thus accessibility, can be restored.
The castle was likely built in the 11th or 12th century. It is believed to have been constructed by a Lord of Har(d)t, who first appears in records in 1105. The first documented mention of the castle dates back to 1166. In 1205, Archbishop Bruno of Sayn captured the castle and partially destroyed it in the process.
It is also known that Count Friedrich von Hochstaden bequeathed Hardtburg Castle to the Archbishopric of Cologne in 1246. The castle, which then belonged to the Electorate of Cologne, served as the administrative seat of the Hardt district—covering an area of 12,100 hectares—until 1794.
The castle complex consists of an outer bailey and a main keep, and, together with the surrounding moat, measures 155 × 107 meters. The curtain wall surrounding the entire complex, which is up to seven meters high but only 60 centimeters thick, spans 119 × 66 meters.
The originally simple castle complex was rebuilt in the 13th century. The outer bailey and the outer enclosure were not constructed until the 14th century and have survived to this day. As drawings from 1725 show, the castle was already in ruins at that time.