Henri-Pierre Danloux in the context of "National Gallery (London)"

A cabinet painting (or cabinet picture) is a small painting, typically no larger than two feet (0.61 meters) in either dimension, but often much smaller. The term is especially used for paintings that show full-length figures or landscapes at a small scale, rather than a head or other object painted nearly life-size. Such paintings are done very precisely, with a great degree of "finish".

From the fifteenth century onward, wealthy collectors of art would keep these paintings in a cabinet, which was a relatively small and private room (often very small even in large houses) to which only those with whom they were on especially intimate terms would be admitted. A cabinet, also known as a closet, study (from the Italian studiolo), office, or by other names, might be used as an office or just a sitting room. Heating the main rooms in large palaces or mansions in the winter was difficult, so small rooms such as cabinets were more comfortable. They offered more privacy from servants or other household members and visitors. Typically, a cabinet would be for the use of a single individual; a large house might have at least two (his and hers) and often more.

The looting of Polish cultural artifacts and industrial infrastructure during World War II was carried out by Nazi Germany and the Soviet Union simultaneously after the invasion of Poland of 1939. A significant portion of Poland's cultural heritage, estimated at half a million art objects, was plundered by the occupying powers. Catalogued pieces are still occasionally recovered elsewhere in the world and returned to Poland.

Priceless items of art still considered missing or found in other museums include works by Bernardo Bellotto, Anna Bilińska-Bohdanowicz, Józef Brandt, Lucas Cranach the Elder, Lucas Cranach the Younger, Albrecht Dürer, Anthony van Dyck, Hans Holbein the Younger, Jacob Jordaens, Frans Luycx, Jacek Malczewski, Raphael, Rembrandt van Rijn, Peter Paul Rubens, Henryk Siemiradzki, Veit Stoss, Alfred Wierusz-Kowalski, Leon Wyczółkowski, Jan Matejko, Henri Gervex, Ludwig Buchhorn, Józef Simmler, Henri-Pierre Danloux, Jan Miense Molenaer and many others.