Georges Vantongerloo
Interrelation of Volumes (1919)
Tate
Jean Arp (Hans Arp)
Constellation According to the Laws of Chance (c.1930)
Tate
Kurt Schwitters
The Autumn Crocus (1926–8, reconstructed 1958)
Tate
Círculo y Cuadrado
Círculo y Cuadrado is an artist group formed in Paris in 1929 which strongly supported new developments in abstract art and in particular promoted mystical tendencies within it