The art during the ancient Roman period was is characterized by the technique known as aerial perspective. Using this technique allowed the artists to create an ilusion of reality because they painted the colours and contour of the distant objects fuzzy, blurred to achieve a spatial effect. The paintings represented landscapes, cotidian scenes, still life, myths, rituals. During the middle ages it is barely notorious the traits of the tracing with the ancient Roman art, but they clearly differ. The areal perspective is gone replaced by the hierarchical one in which the main figure is represented in the largest size without caring about the space in which it is. It is distinctive of this period the religious paintings, the use of symbolisms and an important iconological language. With this explained, we can conclude saying that the technical quality between these two periods fluctuated because it did not improve or decline, it varied, changing its intensity and the techniques using to paint.