pairs flanking a central figure or subject, are derivations in visual terms from pairs of winged Victories in classical art. In this same period, Saint John Chrysostom explained the significance of angels' wings: "They manifest a nature's sublimity. That is why Gabriel is represented with wings. Not that angels have wings, but that you may know that they leave the heights and the most elevated dwelling to approach human nature. Accordingly, the wings attributed to these powers have no other meaning than to indicate the sublimity of their nature." From then on Christian art generally represented angels with wings, as in the cycle of mosaics in the Basilica di Santa Maria Maggiore (432–440). Multi-winged angels, often with only their face and wings showing, drawn from the higher grades of angels, especially cherubim and seraphim, are derived from Persian art, and are usually shown only in heavenly contexts, as opposed to performing tasks on Earth. They often appear in the pendentives of domes or semi-domes of churches. Byzantine art Angels appear in Byzantine art in mosaics and icons. Artists found some of their inspiration from winged Greek figures such as "Victory". They also drew from imperial iconography. Court eunuchs could rise to positions of authority in the Empire. They performed ceremonial functions and served as trusted messengers. Amelia R. Brown points out that legislation under Justinian indicates that many of them came from the Caucasus, having light eyes, hair, and skin, as well as the "comely features and fine bodies" desired by slave traders. Those "castrated in childhood developed a distinctive skeletal structure, lacked full masculine musculature, body hair and beards,...." As officials, they would wear a white tunic decorated with gold. Brown suggests that "Byzantine artists drew, consciously or not, on this iconography of the court eunuch". Daniel 10: 5–6 describes an angel as clothed in linen and girt with gold. Angels, especially the archangel Michael, who were depicted as military-style agents of God, came to be shown wearing Late Antique military uniform. This could be either the normal military dress, with a tunic to about the knees, armour breastplate and pteruges, but also often the specific dress of the bodyguard of the Byzantine Emperor, with a long tunic and the loros, a long gold and jewelled pallium restricted to the Imperial family and their closest guards, and in icons to archangels. The basic military dress it is still worn