Rob van Leeuwen and Hanneke Richel, who, in the past 30 years, built up a substantial collection of 20st century decorative arts, mainly by listening to their own taste and hearts.
It specializes in:
Art Nouveau- and Art Deco glass (Daum, Gallé, Schneider, Loetz, Murano, etc.)
Sculptures (animal- and other bronzes)
Ceramics and porcelain (Rosenthal, Rozenburg, Zsolnay, Copenhagen, etc.)
Many other uncatagorized objects that appeal to the taste of Jugendstil/Art Nouveau and Art Deco adherents.