But even in the earliest efforts of infancy, there is a certain amount of inherited gift. First of all, therefore, one should look at a specimen of such art as Italians had before them when they first began to paint for themselves. With the fall of the Roman Empire and the invasion of the Goths, the centre of civilisation shifted to the capital of the Eastern Church, Byzantium (Constantinople). The characteristics of Byzantine art may be seen in a Greek picture (594). The history of early Italian art is the history of the effort to escape from the swaddling clothes of this rigid Byzantine School. The effort was of two kinds: first the painters had to see nature truly, instead of contenting themselves with fixed symbols--art had to become "natural," instead of "conventional." Secondly, having learned to see truly, they had to learn how to give a true resemblance of what they saw; how to exhibit things in relief, in perspective, and in illumination. In _relief_: that is, they had to learn to show one thing as standing out from another; in _perspective_: that is, to show things as they really look, instead of as we infer they are; in _illumination_: that is, to show things in the colours they assume under such and such lights. The first distinct advance was made by Cimabue and Giotto at Florence, but contemporaneous with them was the similar work of Duccio and his successors at Siena, whose pictures should be studied in this connection. Various stages in the advance will be pointed out under the pictures themselves; and the student of art will perhaps find the same kind of pleasure in tracing the painter's progress as grown-up people feel in watching the gradual development of children.