Although Wikipedia did not yield the photos shown, it did at least lead me in the right direction.
Dora Europos was a Roman city in Syria. It is called the Pompeii of the East.
I had been stumbling over references to it in Barker's "Armies and Enemies of Imperial Rome" and at least one other of the most very excellent Man-at Arms series by Osprey Publications.
The city was destroyed, along with its synagogue and military camp at about the time of Julian's failed expedition against the Sassanid Persian, themselve the successors of the Parthia Empire and the "Successor" Empire of the Seleucids so called because of the manner of its making, ie; held by a successor of Alexander as was the Kingdomin Egypt to which Cleopatra was an heir.
The City fell by siege but, because of this, many historical paintings and other artifacts, such as full armor suits, were preserved until their unearthing 1500 years later during Britains desert campaign against the Ottoman in WWI.
I will get more on this unfortunate city up later.
Among the 'wall paintings' found was a picture of three Roman officers of the late Empire which shows the Swastika on the uniform.
I am having a bit of trouble in getting picture up so I will get back on this thread after I am successful.
Adolf Schickelgruber (AH's real name as I am sure most of you know) did not have exclusive rights to the Swastika.
I am a bit puzzled as some authorities (beleive it or not H.G. Wells in his Outline of History----pre WWII) view the clockwise version of the twisted cross as a symbol of 'bad luck' and the counter clockwise version as the symbol of 'good luck'.
I am aware that the symbol also appears on Buddhist tombstones in Vietnam but I am still trying to pick out the 'why' of that.