Rupprecht Geiger
Rupprecht Geiger (Germany, 1908–2009) was a German abstract painter and sculptor renowned for his vibrant color field paintings. A founding member of the ZEN 49 group, he focused on the expressive power of color, particularly red, using simple geometric forms to evoke emotional responses. Geiger's work significantly influenced post-war European abstraction.

Artwork by Eduardo Chillida
What is abstract art?
Abstract art uses form, shape, line, and color to create a visual experience without attempting to represent external reality. The composition exists independently of the world's visual references, focusing on expressing ideas and emotions through non-representational means.