tad'-mor, tad'-mor (tadhmor): A city built by Solomon in the wilderness (2 Chronicles 8:4), the Roman Palmyra. Tadmor is the native name and is found on inscriptions. It occurs also in the Kere of 1 Kings 9:18, where the Kethibh or consonants read "Tamar" (compare Ezekiel 47:19; Ezekiel 48:28). It is famous in Arabian as well as in Hebrew literature, and enters Roman history in connection with Zenobia and Longinus. The inscriptions, which belong for the most part to the latter period (266-73 A.D.), have been published by Dawkins and Wood and also by M. Waddington and the Duc de Luynes. Popular works on the subject are An Account of Palmyra and Zenobia by W. Wright, and The Last Days and Fall of Palmyra by W. Ware.
TADMOR, this name is found only in 1 Kings 9:18, 2 Chron 8:4. It is supposed to be the same as Palmyra 120 ms. n.e. of Damascus and 60 ms. from the Euphrates. There are many ruins of temples, tombs and palaces found there. Porter says that the ancipnt name of Thadmor is still retained.
Strong's HebrewH8412: Tadmor or Tammor
a city built by Solomon