At many points there are inexhaustible stores of white marble. The
island of Paros, one of the Cyclades, and Mount Pentelicus in
Attica--to name only the two best and most famous quarries--are
simply masses of white marble, suitable as well for the builder as
the sculptor. There are besides various beautiful colored marbles,
but it was left to the Romans to bring these into use. Then there
are many commoner sorts of stone ready to the builder's hand,
especially the rather soft, brown limestones which the Greeks
called by the general name of poros. [Footnote: The word has no
connection with porous] This material was not disdained, even for
important buildings. Thus the Temple of Zeus at Olympia, one of
the two most important religious centers in the Greek world, was
built of local poros. The same was the case with the numerous
temples of Acragas (Girgenti) and Selinus in Sicily. An even
meaner material, sun-dried brick, was sometimes, perhaps often,
employed for cella walls. Where poros or crude brick was used, it
was coated over with a very fine, hard stucco, which gave a
surface like that of marble.

It is remarkable that no use was made in Greece of baked bricks
before the period of Roman domination. Roof-tiles of terra-cotta
were in use from an early period, and Greek travelers to Babylonia
brought back word of the use of baked bricks in that country.
Nevertheless Greek builders showed no disposition to adopt baked
bricks for their masonry.

This probably hangs together with another important fact, the
absence of lime-mortar from Greek architecture. Lime-stucco was in
use from time immemorial. But lime-mortar, i.e., lime mixed with
sand and used as a bond for masonry, is all but unknown in Greek