Adam Clarke on 1 Kings 9:18

And Tadmor in the wilderness - This is almost universally allowed to be the same with the celebrated Palmyra, the ruins of which remain to the present day, and give us the highest idea of Solomon's splendor and magnificence. Palmyra stood upon a fertile plain surrounded by a barren desert, having the river Euphrates on the east. The ruins are well described by Messrs. Dawkes and Wood, of which they give fine representations. They are also well described in the ancient part of the Universal History, vol. i., p. 367-70. The description concludes thus: "The world never saw a more glorious city; the pride, it is likely, of ancient times, and the reproach of our own; a city not more remarkable for the state of her buildings and unwontedness of her situation than for the extraordinary personages who once flourished there, among whom the renowned Zenobia and the incomparable Longinus must for ever be remembered with admiration and regret."