In his ongoing quest for an individual style, with the passing of time Eusebio Sempere moved from abstraction to a geometric simplification, always after a dynamic energy and movement in his works as well as volume and a three-dimensional effect. Initially starting out from and , he shifted towards

 Op Art 

international art movement whose name derives from the abbreviation of the term Optical Art. The movement emerged in the late 1950s and reached its peak between 1965 and 1968. The goal of Op Art is to produce the impression of relief, depth or vibration through visual and optical effects. To achieve this end, artists explore the relationships between colour and space, with the aim of evoking the intended physical experience in the beholder. Artists were influenced by, among others, theories of pure visibility and the theory and philosophy of perception. Although it became popular all over the world, it was in Europe where the movement had its greater development, with figures like Victor Vasarely (1908-1997) and also Carlos Cruz-Diez (1923-2019) and Jesús Rafael Soto (1923-2005); although Venezuelans by birth, these last two artists had settled in Paris in the 1950s and belonged to the circle who gathered around Galerie Denise René. In Spain, one of the main representatives of Op Art was the Valencian artist Eusebio Sempere (1923-1985).

. He was also a member of the Parpalló group.

Sempere’s whole practice revolves around the line, which he uses to create spectacular effects and geometric volumes that seem to levitate in space. Through colour and line, generally drawn in parallel, he manages to introduce a sense of volume and movement in his works, producing a effect.

In 1953 the artist began to create an extensive series of gouaches on black cardboard, to which this piece from 1965 belongs. Starting out with very simple geometric forms they grew more complex from 1959 onwards. In them, he used light colours vibrating against a black background to create geometric and abstract landscapes where light and colour acquire the greatest import.

Horizontes was acquired at Galería Juana Mordó. Its subtle weft of meticulously drawn horizontal lines in warm tones creates a landscape suffused with the light of sunset.