@ Diesel, you were right on with your suggestion. You can even see an image of the bull's head taken from persepolis
here. (scroll down a bit to see it)
@ KAD, thanks for the info regarding the rug. Do you know any sights that have/show similar raised pattern rugs? I couldn't find even one during my search. I paid 20,000 Saudi Riyals for it here (US$ 5,300). It'll soon find a place on the wall next to
this one very soon. One more thing, the framed design and signature within the 'painting' seemed unusual for a tabriz, am I wrong?