One of only two published works from Irish archaeologist and linguist HENRY O'BRIEN (1808-1835), this classic 1834 study of the ubiquitous round towers of Ireland-sometimes published under the title The Round Towers of Atlantis-is hailed by many as a definitive work on the esoteric mysteries of the ancient world. Perhaps the first modern study of pre-Christian megalithic architecture and its connection to the lost world of Atlantis and the first civilizations of Persia, India, and China, this is a treasure trove of information on the secret societies of early Egypt and modern Ireland, including the Druids. From the strange structure of Ireland's round towers to the nature of the wisdom the ancient Irish possessed, this is an essential resource for students of the mysteries of the ancient world.