The only difference in the case of the picture is that the composition is made up, not only of figures, but of the empty spaces of the background also. As artists would say, the composition is an arrangement of full and empty spaces; and its beauty depends upon the harmony and balance between them. In the Jurisprudence, for example, it is remarkable how the space filled by the figure of _Prudence_, corresponds in size and even in its wedge shape to the empty space formed by the upper and lower step of stonework. For the rest, the quantity of space occupied by the other two figures seems to be about equal to the empty spaces around them, though the latter, instead of being solid masses are broken up and distributed. But you will notice, how large a stretch of empty space is left at the top of the lunette, so that the eye is drawn upward and the dignity of the whole decoration thereby elevated. Note also, what a quiet impressive spot the head of Prudence makes against the background of the sky. There is, as it were, nothing to disturb its gracious repose. This device of setting a figure against the background of the sky, Raphael may have learned from one of his masters, Perugino. At any rate, both employed it, with beautiful effect.