IN addition to the Egyptian and Cretan labyrinths, a few other structures are referred to as being in the same category, but not until a fairly late period. Pliny (died A.D. 79) mentions one built by Smilis of Aegina, after the Egyptian model, on the island of Lemnos, and says that it was renowned for the beauty of its 150 columns and that remains of it existed in his time.