Seraphim Angel Painting - Aya Sofya (Istanbul)
They look like strange headless angels with blue and brown feathers.
The six-winged figure is though to depict the seraphim, an angel described in the biblical book of Isaiah. This faceless representation was painted over a mosaic of the Seraphim when the church was turned into a mosque. The original mosaic of the angel is believed to be under the painted plaster.
For more information about this angel image, read www.worldbulletin.net/news_detail.php?id=45257
For more information about Aya Sofya, read en.wikipedia.org/wiki/Hagia_Sophia.