Kunstauktionhaus Schloss Ahlden was established in 1975. The art dealers Florian and Karin Seidel bought a castle, restored it and later the same year held their first auction there.
They host 3 major auctions a year with approximately 2500-300 objects. Their specialist areas are;Porcelaine, especially early 18th Meißen, Art Nouveau and Art Deco especially glass objects by Emile Gallé. IN addition to their specialist areas the include private collections and estate collections in their auctions.