The Holthaus Museum displays parts of the work of Heinrich Holthaus, a sculptor who died in 1980, who also worked in Plettenberg for a time and is buried there.
It was established in Plettenberg by the architect Helmut Teichert in the years between 2009 and 2015.
The aim and task of the museum is the preservation and publication of the work of Heinrich Holthausen. The museum contains about 250 inventory numbers from the possession of Helmut Teichert, perhaps particularly noteworthy are the numerous original plasters that served as casting templates of bronze sculptures, which are now in public space in various places, including Hagen and Plettenberg.
It is financed exclusively by private supporters, in particular, now already in the second generation, by the Plettenberg family Schauerte.
Remarkable is the studio or workshop character of the museum, which serves both the presentation and the storage, everything is shown.