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chap. vii
PALACE ARCHITECTURE
113
exceptional cases where the central intercolumniation is considerably widened to give a more ample passageway, as in the Propylæa at Athens. The Romans, in their triumphal arches, increased the width of the central space, but no other inequality of spacing is common in ancient art.
Fig. 61.—Façade of the Cancelleria, Rome.
The façade of the Cancelleria has a feature that is not common in Italian architecture, that of a slight advance of the wall at each end, so as to form projecting bays, as in the pavilions of the French Renaissance châteaux. The salience of these bays is very slight, however, and is hardly noticeable in a general
