All noteworthy pieces of artwork are being sought from each of the following periods
- Expressionism
- --Die Brücke
- --Der Blaue Reiter
- --Die Neue Sachlichkeit
- --Bauhaus
- Cubism
- Dada
- Futurism
- Neo-Plasticism
- Surrealism
- Precisionism
- Art Deco
- The Harlem Renaissance
- Abstract Expressionism
- Pop Art
- Op Art
- Arte Povera
- Photorealism
- Minimalism
- The Sensation Show