Capital (architecture) - Classical Capitals

Classical Capitals

The Doric capital is the simplest of the five Classical orders: it consists of the abacus above an ovolo molding, with an astragal collar set below. In the Temple of Apollo, Syracuse (c. 700 BC), the echinus moulding has become a more definite form: this in the Parthenon reaches its culmination, where the convexity is at the top and bottom with a delicate uniting curve. The sloping side of the echinus becomes flatter in the later examples, and in the Colosseum at Rome forms a quarter round (see Doric order).

In the Ionic capital (illustration at top of page), spirally coiled volutes are inserted between the abacus and the ovolo. In the Ionic capitals of the archaic Temple of Artemis at Ephesus (560 BC) the width of the abacus is twice that of its depth, consequently the earliest Ionic capital known was virtually a bracket capital. A century later, in the temple on the Ilissus, the abacus has become square (See the more complete discussion at Ionic order).

It has been suggested that the foliage of the Greek Corinthian capital was based on the Acanthus spinosus, that of the Roman on the Acanthus mollis. Not all architectural foliage is as realistic as Isaac Ware's (illustration, right) however. The leaves are generally carved in two "ranks" or bands, like one leafy cup set within another. One of the most beautiful Corinthian capitals is that from the Tholos of Epidaurus (400 BC); it illustrates the transition between the earlier Greek capital, as at Bassae, and the Roman version that Renaissance and modern architects inherited and refined (See the more complete discussion at Corinthian order).

In Roman architectural practice, capitals are briefly treated in their proper context among the detailing proper to each of the "Orders", in the only complete architectural textbook to have survived from classical times, the Ten Books on Architecture, by Marcus Vitruvius Pollio, better known just as Vitruvius, dedicated to the emperor Augustus. The various orders are discussed in Vitruvius' books iii and iv. Vitruvius describes Roman practice in a practical fashion. He gives some tales about the invention of each of the Orders, but he does not give a hard and fast set of canonical rules for the execution of capitals.

Two further, specifically Roman orders of architecture have their characteristic capitals, the sturdy and primitive Tuscan capitals, typically used in military buildings, similar to Greek Doric, but with fewer small moldings in its profile, and the invented Composite capitals not even mentioned by Vitruvius, which combined Ionic volutes and Corinthian acanthus capitals, in an order that was otherwise quite similar in proportions to the Corinthian, itself an order that Romans employed much more often than Greeks.

The increasing adoption of composite capitals signalled a trend towards freer, more inventive (and often more coarsely carved) capitals in Late Antiquity.