page_title: Hellenistic astrology
section_title: Astrology in Hellenistic Egypt
hierarchical_section_title: Hellenistic astrology / Astrology in Hellenistic Egypt
caption_attribution_description: Français&#160;: Représentation fidèle du Zodiaque de Denderah English: Dendera zodiac with original colors (reconstructed) - courtesy of Alexandre N.Isis
context_page_description: Hellenistic astrology is a tradition of horoscopic astrology that was developed and practiced in the late Hellenistic period in and around the Mediterranean region, especially in Egypt. The texts and technical terminology of this tradition of astrology were largely written in Greek. The tradition originated sometime around the late 2nd or early 1st century BCE, and then was practiced until the 6th or 7th century CE. This type of astrology is commonly referred to as "Hellenistic astrology" because it was developed in the late Hellenistic period, although it continued to be practiced for several centuries after the end of what historians usually classify as the Hellenistic era.
context_section_description: In 525 BCE Egypt was conquered by the Persians so there is likely to have been some Mesopotamian influence on Egyptian astrology. Arguing in favour of this, Barton gives an example of what appears to be Mesopotamian influence on the zodiac, which included two signs – the Balance and the Scorpion, as evidenced in the Dendera Zodiac (in the Greek version the Balance was known as the Scorpion’s Claws).
  After the occupation by Alexander the Great in 332 BCE, Egypt came under Greek rule and influence. The city of Alexandria was founded by Alexander after the conquest and during the 3rd and 2nd centuries BCE, the scholars of Alexandria were prolific writers. It was in 'Alexandrian Egypt' that Babylonian astrology was mixed with the Egyptian tradition of Decanic astrology to create Horoscopic astrology. This contained the Babylonian zodiac with its system of planetary exaltations, the triplicities of the signs and the importance of eclipses. Along with this it incorporated the Egyptian concept of dividing the zodiac into thirty-six decans of ten degrees each, with an emphasis on the rising decan, the Greek system of planetary Gods, sign rulership and four elements.
  The decans were a system of time measurement according to the constellations. They were led by the constellation Sothis or Sirius. The risings of the decans in the night were used to divide the night into ‘hours’. The rising of a constellation just before sunrise (its heliacal rising) was considered the last hour of the night. Over the course of the year, each constellation rose just before sunrise for ten days. When they became part of the astrology of the Hellenistic Age, each decan was associated with ten degrees of the zodiac. Texts from the 2nd century BCE list predictions relating to the positions of planets in zodiac signs at the time of the rising of certain decans, particularly Sothis.
  Particularly important in the development of horoscopic astrology was the astrologer and astronomer Ptolemy, who lived in Alexandria in Egypt. Ptolemy's work the Tetrabiblos laid the basis of the Western astrological tradition. The earliest Zodiac found in Egypt dates to the 1st century BCE, the Dendera Zodiac.
  According to Firmicus Maternus (4th century), the system of horoscopic astrology was given early on to an Egyptian pharaoh named Nechepso and his priest Petosiris. The Hermetic texts were also put together during this period and Clement of Alexandria, writing in the Roman era, demonstrates the degree to which astrologers were expected to have knowledge of the texts in his description of Egyptian sacred rites:
  This is principally shown by their sacred ceremonial. For first advances the Singer, bearing some one of the symbols of music. For they say that he must learn two of the books of Hermes, the one of which contains the hymns of the gods, the second the regulations for the king's life. And after the Singer advances the Astrologer, with a horologe in his hand, and a palm, the symbols of astrology. He must have the astrological books of Hermes, which are four in number, always in his mouth.
caption: Dendera zodiac with original colors (reconstructed)
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