50, which is the plan
of a Doric temple, the exterior columns are set without regard to
the cella wall, and the columns of the vestibules. This is a
regular difference between Doric and Ionic temples, though the
rule is subject to a few exceptions in the case of the former.
The plan of almost any Greek temple will be found to be referable
to one or other of the types just described, although there are
great differences in the proportions of the several parts. It
remains only to add that in almost every case the principal front
was toward the east or nearly so. When Greek temples were
converted into Christian churches, as often happened, it was
necessary, in order to conform to the Christian ritual, to reverse
this arrangement and to place the principal entrance at the
western end.
The next thing is to study the principal elements of a Greek
temple as seen in elevation. This brings us to the subject of the
Greek "orders." There are two principal orders in Greek
architecture, the Doric and the Ionic. Figs.
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