Vitruvius, De arch. 3.3.5 (ca. 30 B.C.): In araeostylis autem nec lapideis nec marmoreis epistyliis uti datur, sed inponendae se materia trabes perpetuae. Et ipsarum aedium species sunt varicae, barycephalae, humiles, latae, ornanturque signis fictilibus aut aereis inauratis earum fastigia tuscanico more, uti est ad Circum Maximum Cereris et Herculis Pompeiani, item Capitoli. In araeostyles we cannot employ stone or marble for the architraves, but must have a series of wooden beams laid upon the columns. And, moreover, in appearance these temples are clumsy-roofed, low, broad, and their pediments are adorned in the Tuscan fashion with statues of terra-cotta or gilt bronze: for one example, near the Circus Maximus, the temple of Ceres, and Pompeius' temple of Hercules; also the temple on the Capitol.  (F. Granger, trans.)