Römerberg 25, Cultural heritage monument at Römerberg, Frankfurt, Germany.

Haus Frauenstein is a heritage-protected building at Römerberg standing between two other historic houses on the square's north side. The structure combines a late Gothic cellar from the 15th century with a Baroque stone front and modern elements added after World War II.

The building originated as a gathering place for a craft society in the early 15th century, which later undertook major reconstruction work. The current structure with its cellars and stone facade developed over generations.

The name comes from the Stubengesellschaft Zur güldenen Schmiede, a smiths' guild that moved in in 1423 and called itself Zum Frauenstein from then on. It bought the house in 1444 and gave it up in 1694. The tesserae panels under the windows are a detail to look for on the facade.

The building stands directly at Römerberg and is easily reached on foot, especially when coming from the Main river side. You can view the exterior at any time, though details of the different architectural styles are best seen in daylight.

The house was completely rebuilt after wartime destruction, yet its visible structure faithfully follows the original design. Inside, a modern concrete framework connects different sections in a way that remains invisible from the street.