Artist

RA

Robert Barry, American

American

Otl Aicher (also known as Otto Aicher), German

German

David Bowie, British

British

CG

Charline von Heyl, German

German

Ai Weiwei, Chinese

Chinese

HA

Hedda Sterne, American

American

Gustave Le Gray, French

French

Lewis Baltz, American

American

TA

Tom Wesselmann, American

American

Massimo Campigli, Italian

Italian