After the submission of those cities to Alexander the Great in 333 B.C. the globe and crescent seems to have been exchanged for a cruciform standard similar to that shown in the left hand of the goddess Astarte in the coin of 87 B.C. depicted in Plate II, fig. 4. This cruciform standard was probably adopted by Alexander from the Athenians, the most prominent naval power of Greece, among whom it seems to have been an object of great significance[14]. On two great amphorae awarded to the victors in the Panathenaic games of 336-5 B.C., now in the British Museum, it is represented in a manner which can leave no doubt as to its symbolic importance. On one of them Athene holds in her hand a long cruciform staff, the head of which is expanded in ovoid form. On the other amphora the goddess has by her side a short column which is surmounted by a winged Victory (Nike) holding in her left hand a similar standard, and in her right the aphlaston of a galley. Unfortunately for our purpose, the Athenians did not represent ships upon their coinage, but similar standards are seen in the hand of the nymph Histiaea upon the coins of the Euboean town of that name, dated circa 313-265 B.C., two of which are represented in Plate II, figs. 7 and 8. Many other instances, too numerous to detail, will be found upon later Greek coins. In these the crosses are not all of the same design, and Prof. Babelon has collected examples of thirty-six forms, all more or less different, from the plain cross to a more elaborate form in which the head terminates in a ball and two small winged figures of Victory kneel at the ends of the arms. Some of these forms are decorated with narrow streamers; in many of them the cross-piece is not at right angles to the staff, but it is possible that this may be due to an attempt at perspective. One other instance deserves mention: the excavations on the site of the important city of Pergamum in Asia Minor, once the capital of the kingdom of Pergamus, and afterwards that of the Roman province of Asia, have brought to light the bas-reliefs which decorated the balustrade of the Portico of Athene Polias. On this bas-relief, which, in the opinion of M. Collignon[15], alludes to naval victories under Attalus (241-197 B.C.) or Eumenes II (197-159), the cruciform standard is twice represented in highly ornate forms terminating in pine cones at the head; in each case it is accompanied with the aphlasta and beaks of galleys.