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. It became the preferred style of the Greek mainland and the western colonies (southern Italy and Sicily). 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 versions where the frieze and other elements are simpler the same form of capital is described as being in the Tuscan order. Doric reached its peak in the mid-5th century BC, and was one of the orders accepted by the Romans. Its characteristics are masculinity, strength and solidity.