[4] Formed in 1957, it included artists such as Castellano, Genovés, Navarro, Soria, Michavila, Andres Alfaro, Manolo Gil, Amadeo Gabino, Isidoro Balaguer, and others striving to renew the cultural landscape in Valencia.
In 1964, Sempere was granted a Ford Foundation fellowship which allowed him to travel to the United States and put on an exhibition at the Bertha Schaefer Gallery, and to show his work in the Spanish Pavilion at the World’s Fair in New York.
In 1969, he traveled again to the United States on a fellowship and there used a computer to create original art, a technique that he would continue to experiment with on his return to the University of Madrid, where he became a pioneer of this innovation in Spain.
Sempere persuaded his artist friends, including Pablo Serrano, Miró, and Chillida, to donate their work, much of which is spectacular, especially his own cascade that forms a centerpiece of the assembly.
His paintings are considered as two-dimensional surfaces where the artist plays with visual elements—light, colors and tones—using perceptual and optical effects to create suggestive forms in repeating geometric shapes.
Overall, it includes these and more than 500 pieces comprising paintings, sculptures, mixed media and lithographs by other Spanish and foreign artists such as Dalí, Picasso, Millares, Serrano, Miró, Gris, Kandinsky, Chagall and Vasarely, and covering all stages of Sempere's own career.
Sempere's outdoor sculpture of metal rods at the Juan March Foundation in Madrid inspired two Spanish physicists to develop a new method for cancelling noise.