palmyra´s monumental arch

landmark ruins column arch architecture temple monument building history fortification monastery monumental eastern section colonnade palmyra homs governorate syria palmyrahe palmyra´s ancient temple architecture column greek culture ruins roman old stone history travel ruin landmark acropolis archeology monument columns tourism historic city sky building semitic palmyra governorate syria middle east neolithic period empire caravans trade historic site archaeological tadmur civil war unesco world heritage desert colors blue ancient temples colonnade excavations