THE DIADEM.
The chief of these ornaments is the diadem, or vitta, which was a ribband worn about the head, and tied in a floating knot behind. This was anciently the simple, but superlative badge of kingly power. It is observable upon the Greek monarchical medals, from the earliest ages, to the last, without any other ornament, and is almost an infallible sign of kingly power, and that the portrait, if there be no other characteristic, is that of a prince. In the Roman coins it is seen on the Consular ones with Numa and Ancus; but never afterwards till the time of Licinius. So great an aversion had the Romans to this kingly distinction, that their emperors had for more than two centuries worn the radiated crown, peculiar to the gods, before they dared to assume the diadem, which was considered as the symbol of tyranny. In the family of Constantine, the diadem becomes common, though not with the ancient simplicity, being ornamented on either edge with a row of pearls, and various other decorations.
The Greek queens used the diadem, but the Roman empresses never appear with it; however, the variety of their head dresses more than compensates for the want of this ornament.