VICTOR VASARELY (Pécs, Hungary, 1908 - Paris, 1997). "Llide-D", 1962-1968. Acrylic painting on wood. Signed in the lower central margin. Signed, dated and titled on the back. Enclosed certificate issued by Pierre Vasarely. Measurements: 54 x 54 cm; 80 x 80 cm (frame). The painting "Llide-D" belongs to the collection "Ondulatoires", one of the emblematic series of Victor Vasarely, that the French-Hungarian artist, father of Op Art, made in the peak period of his career. The "Ondulatoires" series is inspired by the swaying of sea waves and the way light reflects on water. It is a paradigmatic example of kinetic art, an artistic style that explores the perception of movement through optical illusion and which Vasarely championed. It presents an abstract composition of lines that open outwards and, with a studied combination of the chromatic shift and the thickness of the line, produce an undulating effect when the viewer walks in front of the piece. "Llide-D" suggests the hypnotic calm of the experience of contemplating the sea at sunset. Considered the father of Op Art, Victor Vasarely began his artistic training at the Muheely school, founded in Budapest by a Bauhaus student. He settled in Paris in 1930, where he created what is considered today as the first Op Art work, "Zebra" (1937). In Paris he worked as a graphic designer for advertising agencies. During this period his artistic style varied from figurative expression, towards a type of constructive and geometric abstract art, interested in the representation of perspective without vanishing points.between 1936 and 1948 he participated regularly in the Salon des Surindependents and in the Salon des Nouvelles Réalités. From 1948 he exhibited regularly at the Denise René Gallery. In the fifties his work approached the use of new materials and supports such as aluminum or glass. In the same way he began to make works of integration with space, such as Homage to Malevich. In the sixties he participated in numerous group exhibitions, such as The Responsive Eye at the Museum of Modern Art in New York, as well as solo exhibitions in Europe and America. Among the numerous awards he received throughout his life, the Guggenheim Prize (1964), the Art Critics of Brussels and the gold medal at the Milan Triennial stand out. In 1970 he was also named Knight of the Order of the Legion of Honor. He is represented in the museums dedicated to him in Aix-en-Provence, Pécs and Budapest, but also in the most important centers of contemporary art in the world, such as the Tate Gallery in London, the MoMA in New York, the Guggenheim in Venice or the Reina Sofia in Madrid.