Why was the circle important to Wassily Kandinsky’s art theory?

For Wassily Kandinsky, the circle was a fundamental element of his art theory, representing a bridge to the "fourth dimension" and a source of profound, beautiful opposition.1

During his tenure at the Bauhaus, Kandinsky began to methodically apply his theories regarding the relationship between color and form, as well as their psychological and spiritual effects. He viewed the circle as a primary form that held immense significance within his compositions. In works such as Composition VIII, the circle serves as a powerful anchor, providing a striking contrast to sharp, aggressive geometric elements like lines and triangles.1

Kandinsky’s interest in the circle was part of his broader analytical approach to abstract elements, which he detailed in his writings, such as Point and Line to Plane, where he explored how basic forms and colors could evoke specific emotional or spiritual responses.12