or possibly the symbol of the white elephant who reputedly entered the womb of the mother of the Buddha, Queen Maya, in a dream, which would make it a symbol of Buddhism, one of the main religions of the Indo-Greek territories. Similarly, the sacred bull on the reverse may be a symbol of a city (Pushkhalavati), or a depiction of Shiva, making it a symbol of Hinduism, the other major religion at that time. The bull is often represented in a clearly erectile state, which reinforces its interpretation as a representation of Shiva. Conversely, this also reinforces the interpretation of the elephant as a religious symbol. Alternatively, the Bull, according to Foucher, represents the birth of the Buddha, as it happened during the month of Vaicakha (April–May), known to Buddhists as Vesak, under the zodiacal sign of the Taurus, during the full moon. The enlightenment and passing of the Buddha also occurred during the Taurus full moon. Buddhist and Hindu symbolism Before their design was eventually simplified, some of the earlier coins of king Apollodotus directly associate the elephant with Buddhist symbolism, such as the stupa hill (arched-hill symbol) surmounted by a crescent or a star (the Chaitya symbol), also seen, for example on the coins of the Mauryan Empire, many local coins of Taxila or those of the later Kuninda kingdom. Also the zebu bull on the reverse is often shown with a nandipada taurine mark on its hump on the less-worn coins, which reinforces the role of the animal as a symbol, religious or geographic, rather than just the depiction of an animal for decorative purposes. The nandipada and the zebu bull are generally associated with Nandi, Shiva's humped bull in Hinduism. The same association was made later on coins of Zeionises or Vima Kadphises. The elephant, pendant to the bull, and shown with a girdle on the obverse, also must have a symbolic role, possibly Buddhism, as it was associated with the stupa hill in the earliest coins of Apollodotus. Apollodotus experimented with different coin standards for his silver, until he settled for a standard lighter than the Attic which would prevail for centuries, though later rulers usually struck round coins instead of the square (typically Indian) shape of most of Apollodotus' silver. He issued a number of bronzes with Apollo/tripod, that also were repeated for centuries. Bactrian coins Apollodotus also issued a small series of monolingual