Burg Frankenberg

Frankenberg Castle (Burg Frankenberg) is a medieval moated castle in the Frankenberger Viertel district of Aachen, Germany, once built outside the city's historic fortifications and now standing as one of the district's most recognizable landmarks.

Who built the castle and when was it constructed?

Arnold I von Merode is credited as the driving force behind the construction of Frankenberg Castle, conceived as a fortified residence just beyond the old walls of Aachen. The building itself is first mentioned in written records only in 1352, though it is believed to have been built earlier. Shortly after its construction, the lowland castle became a countly fief, later coming under the influence of the Duchy of Jülich-Cleves-Berg.

What roles has the castle played over the centuries?

Across the centuries, Frankenberg Castle passed through different owners and functions while remaining a distinctive feature of the city thanks to its watery setting and medieval silhouette. At the start of the 20th century, the castle's main building served as the residence and workplace of Hugo Junkers, the noted German engineer and aircraft designer, tying the site to the early history of German aviation and industry.

What happened to the castle during the Second World War?

The building was destroyed during the Second World War. In the aftermath, it was temporarily used as a labor office before a longer-term plan for the site was decided.

When did the castle become a museum?

Planning for a regional museum at the castle complex began in September 1961. From that point until August 2010, the former water castle housed a museum dedicated to the history of the Aachen region.

What could visitors see inside the museum?

The exhibition covered a broad sweep of regional history — from Stone Age flint mines, through the era of Roman thermal baths, up to the Industrial Revolution. This allowed visitors to trace the development of the area across several millennia within a single site.

Where exactly is Frankenberg Castle located?

The castle stands in Aachen, in the state of North Rhine-Westphalia in western Germany, close to a city center best known for its cathedral and Carolingian heritage. The surrounding Frankenberger Viertel is a quiet, largely residential part of the city.

Frequently asked questions

Can Frankenberg Castle still be visited today? The building itself remains visible and can be viewed from the outside, but the permanent museum exhibition that operated until August 2010 is no longer open.

Why is the castle linked to aviation history? Because Hugo Junkers, one of the pioneers of the German aircraft industry, lived and worked there in the early 20th century before his activities expanded onto a much larger industrial scale.

What sets Frankenberg Castle apart from other castles in the region? Its defining features are its construction as a lowland moated castle close to a major city and its layered history — from a medieval knightly seat, to an engineer's residence, to a regional museum.

How did the castle survive the war? The building was destroyed during the Second World War, and its reconstruction and repurposing only took shape in the following decades, eventually leading to the museum that opened in the 1960s.