Antiques found on sale "relic of crusaders"
 

British art dealer named Martin Roberts found his friends arranged for the sale of a wooden plaque decorated with paintings in length about 25 centimeters. Experts in medieval art suspect that in the hands of Roberts hit the door tabernacles, which belonged to the Crusaders, perhaps the Knights Templar, writes The Independent.
The first expert, who had seen the door, suggesting that it depicts St George and snakes, but then he put forward the hypothesis that it is Roman, killing a Turk, and it shows the connection with the Crusades. Another expert believes that the door is created in the East, possibly in the Byzantine Empire, between 700 and 1200 years. Unfortunately, the source was not arguing in favor of the Templars' hypothesis, stated in the material.
Roberts did not buy he found the plate: he or she purchased it on a pine chest of drawers and glass handles XIX century, had bought earlier for 13 pounds sterling. Currently estimated tabernacles door is on the examination of the house Christie's, and if its authenticity is confirmed, then it will be traded in December, reports The Daily Telegraph. Preliminary cost findings were not disclosed. Roberts, writes The Daily Mail, ready for any turn of events: it will arrange and 6 pounds, and 600.
(Lenta.ru)

Well no shit myself an expert - a Turk from the snake can not tell:)
And why would a Roman depicted with a halo?

A thing like a very beautiful and clearly Byzantine.