Victor Vasarely was a Hungarian-born artist considered the "father" of Op Art. He went through different artistic styles before developing his geometric and precise Op Art works. His Op Art pieces became very popular in commercial forms like posters and fabrics. Vasarely used the profits from his work to design and build his own museum. He was internationally recognized as one of the most important 20th century artists and the leader of the Op Art movement, influencing many modern artists with his innovative use of color and optical illusions.