Much theory of art is connected with painting. As
said by Maurice Denis: "Remember that before all; a painting is
essentially a flat surface covered with colors assembled in a certain
order". This unique order can show and uncover the developments in
paintings throughout time. When cataloguing the painting all the layers of
information are retrieved: methods, technique, materials, style, movements and
even the spirit of the time of the painting. The whole history of the time is
uncovered through the information.
