An Armoured Horseman on a Sasanid Bulla

In the national archaeological musuem in Tehran were a cluster of a dozen or so clay bullae: hanging attachments to a skin or papyrus document which could take a seal. The name is medieval, but the technique is much older. These ones come from the Sasanid period (6th or 7th century CE), and I suspect that they turned up on the art market or in a private collection and the Iranian government was able to show that they had left the country without permission. Several of them show armed men riding armoured horses.
Unfortunately, I had very limited time to take photos of the whole museum, and I do not have a polarizing filter for my camera to reduce glare from the case. The photo above is my best, but I have include several other legible photos below the fold. All are of the same bulla, but there were one or two others with armed men on them which I was not successful in photographing.
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