[1] In 1895, its owner, Louisa Holthuysen, bequeathed the building and its contents, including the art collected by her and her husband, Abraham Willet, to the city of Amsterdam on condition that it became a museum bearing their names.

In the blue room, several paintings on the walls show previous owners (by unspecified artists).

In this room there are also several decorative paintings by Jacob de Wit, though these have been sourced from other buildings in Amsterdam.

Decorative pieces by Jacob de Wit were at some stage in the house, but previous owners took them with them.

[citation needed] Flower paintings are on display by various Amsterdam painters, such as Adriana Johanna Haanen.