This is certainly an interesting piece, but I to have doubts as to its authenticity. It doesn't fit neatly into any recognizable category, and appears a fanciful amalgam of elements, e.g., the central cruciform comprised of stems (?), the ring and dot motif, and the fronds around the periphery. Similar band shapes are attested from the late medieval centuries but genuine examples hardly qualify as Byzantine artifacts. Looks suspiciously like a Bulgaro-fake or similar ripoff.
Gaius
