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In classical architecture, the shape of the abacus and its edge profile varies in the different classical orders. In the Greek Doric order, the abacus is a plain square slab without mouldings, supported on an echinus. [2] In the Roman and Renaissance Doric orders, it is crowned by a moulding (known as "crown moulding").
The Doric order of the Parthenon. Triglyphs marked "a", metopes "b", guttae "c" and mutules under the soffit "d" The Doric order is one of the three orders of ancient Greek and later Roman architecture; the other two canonical orders were the Ionic and the Corinthian. The Doric is most easily recognized by the simple circular capitals at the ...
The upper half is distinctive for the Doric order. The frieze of the Doric entablature is divided into triglyphs and metopes. A triglyph is a unit consisting of three vertical bands which are separated by grooves. Metopes are the plain or carved reliefs between two triglyphs. The Greek forms of the Doric order come without an individual base.
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. It was developed in the lands occupied by the Dorians , one of the two principal divisions of the Greek race.
In the Doric order, the capital consists of a circular torus bulge, originally very flat, the so-called echinus, and a square slab, the abacus. In the course of their development, the echinus expands more and more, culminating in a linear diagonal, at 45° to the vertical.
The Doric order developed on mainland Greece and spread to Magna Graecia (Italy). It was firmly established and well-defined in its characteristics by the time of the building of the Temple of Hera at Olympia, c. 600 BC. The Ionic order co-existed with the Doric, being favoured by the Greek cities of Ionia, in Asia Minor and the Aegean Islands.
In the pure classical Doric order entablature is simple. The architrave, the lowest band, is split, from bottom to top, into the guttae, the regulae, and the taenia. The frieze is dominated by the triglyphs, vertically channelled tablets, separated by metopes, which may or may not be decorated. The triglyphs sit on top of the taenia, a flat ...
An abacus (pl. abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system. [1] An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their ...