Dorotheus of Sidon

Dorotheus of Sidon (Ancient Greek: Δωρόθεος Σιδώνιος, c. 75 CE - ?? CE) was a 1st-century Greek astrologer and astrological poet, who, during the Hellenistic Period, wrote a didactic poem on horoscopic astrology in Greek, known as the Pentateuch (Πεντάτευχος; lit. five books; more commonly known in the Western world as Carmen Astrologicum), surviving in Greek fragments and an Arabic translation by Omar Tiberiades.

Very little is known about Dorotheus himself. Dorotheus most likely lived and worked in Alexandria, in Egypt, which, in addition to being the most important scholastic center in the Hellenistic world, was also the main location where the oldest Mesopotamian, Greek and Egyptian astrological techniques were synthesized together in order to create horoscopic astrology. According to Firmicus Maternus, Dorotheus was originally a native of the city of Sidon (Firmicus, Mathesis, 2, 29: 2).