The term
Aureola or aureole (diminutive of Latin aura,
"air") refers to the radiance of luminous cloud which, in paintings of sacred
personages, surrounds the whole figure. In the earliest periods of Christianart this splendour was confined
to the figures of the persons of the Godhead,
but it was afterwards extended to the Virgin
Mary and to several of the saints.
The aureola,
when enveloping the whole body,
generally appears oval or elliptical in form, but occasionally circular or quatrefoil.
When it appears merely as a luminous disk
round the head, it is called specifically
a nimbus, while the
combination of nimbus and aureole is called a glory.
The strict distinction between nimbus and aureole is not commonly maintained,
and the latter term is most frequently used to denote the radiance round the heads
of saints, angels or persons
of the Godhead.
The nimbus in Christian art appeared first in the 5th
century, but practically the same device was known still earlier, though its
history remains obscure, in non-Christian art.
Thus (though earlier Indian
and Bactrian coins do not show it) it is found with the gods
on some of the coins of the Indian kings Kanishka, Huvishka and Vasudeva, 58 B.C.
to A.D. 41 (Gardner's Cat. of Coins of Greek and Scythic Kings of Bactria and
India, Brit. Mus. 1886, plates 26-29). And its use has been traced through
the Egyptians to the Greekss
and Romanss, representations of Trajan
(arch of Constantine) and Antoninus
Pius (reverse of a medal) being found with it.
In the circular form the nimbus constitutes a natural and even primitive use of
the idea of a crown,
modified by an equally simple idea of the emanation of light
from the head of a superior being, or by the meteorological phenomenon of a halo.
The probability is that all later associations with the symbol refer back to an
early astrological origin (compare Mithras),
the person so glorified being identified with the sun
and represented in the sun's image; so the aureole is the Hvareno of Mazdaism.
From this early astrological use the form of "glory" or "nimbus" has been adapted
or inherited under new beliefs.