writer to argue for an influence of the Moon on the tides, and as well as being the first to suggest that the Three Magi who celebrated the Nativity of Jesus were astrologers. An astronomical table spanning 84 years was cited by St. Columbanus during debates with Pope Gregory the Great over the Easter Controversy. Astrological charts in Ireland are recorded as going back to the 8th century, and in 814, the geographer Diciul wrote De astronomiam, a text covering both astronomy and astrology. High and Late Middle Ages Starting from the 11th century, Arabic astrology brought to Europe from universities led to a standardization of Irish astrology with Continental equivalents. Although Ireland between the 12th and 15th centuries was "a rich source of manuscript texts and books about astronomy and astrology", any trace of pre-Christian astrological systems had been erased at this point. See also Archaeoastronomy Celtic calendar References Astrology by tradition Irish mythology Astrology Irish astrologers Astrology