Although Bertrada Castle (named after Bertrada of Laon, German: Bertrada von Mürlenbach. See: Prüm) was mentioned for the first time in 1331, in Roman times, there was presumably a Roman castel and in the 8th century – a Carolingian castle, at the place. Bertrada Castle in Mürlenbach is one of the presumable birthplaces of Charlemagne (see Prüm, Aachen, Düren, and Liège).
The 30-meter-high donjon.
There is almost no information on the Parish Church of St. Lucy in Mürlenbach. On the website roscheiderhof.de, it is said that it is probably the oldest Christian place of cult in the whole Eifel. It was initially dedicated to the Virgin Mary, but after obtaining relics of St. Lucy in 970, she became patron saint of the church.
Its present appearance dates from 1923/24, when it was reconstructed.