Prato, houses, hills is a landscape built through the skilful use of color arranged with small and calibrated brushstrokes vertically, as if to compose the tiles of a mosaic. This way of proceeding is typical of the works of 1966 and denotes the intention to avoid any impressionistic approximation by entrusting the image with a structure. In this lucid rationality of the system, the emotion is not stopped, but is expressed. The painter needs to let the image settle in order to set it clearly with a dominated formal and constructive elaboration. The landscape is constructed, like other paintings of this period, according to a horizontal trend, along abstract polychrome bands. Color is the protagonist of the work, but as Guido Ballo maintains, color, in Zanella, is never sensual: it is as if filtered by the intellect. Green predominates in all its variations and shades, interspersed with spots of browns, reds, purples and blues. There is no separation between the sky, the earth, the houses, but everything is permeated in a single light that softens the whole landscape; the colors vibrate one in the reflection of the other creating a sense of lively harmony. Zanella turns his attention to the world illuminated by light and with color and its vibrations it makes the atmosphere and the light itself of the air, dissolving the consistency of objects and the outlines of things, the landscape becomes thus a single flow of light and color, the true essence of reality. The chromatic orchestration follows only internal rhythms, dissolving in them the suggestion of the natural impression. The painting is characterized by an abstract and informal language reentering in Lombard naturalism with accents of esp abstract ressionism. In addition to being a painter, Silvio Zanella was one of the founders of the Gallarate Prize in 1949 and the founder and first director of the Civic Gallery of Modern Art in Gallarate from 1966 to 1998.