Julius Firmicus Maternus
Overview
Julius Firmicus Maternus was a Christian Latin
Latin
Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

 writer and notable astrologer
Astrologer
An astrologer practices one or more forms of astrology. Typically an astrologer draws a horoscope for the time of an event, such as a person's birth, and interprets celestial points and their placements at the time of the event to better understand someone, determine the auspiciousness of an...

, who lived in the reign of Constantine I
Constantine I
Constantine the Great , also known as Constantine I or Saint Constantine, was Roman Emperor from 306 to 337. Well known for being the first Roman emperor to convert to Christianity, Constantine and co-Emperor Licinius issued the Edict of Milan in 313, which proclaimed religious tolerance of all...

 and his successors.
He was also a Sicilian lawyer from upper nobility; his manuscripts include titles indicating the Senatorial order. Author of Matheseos Libri Octo ("Eight Books of Astrology", c. 330) and De errore profanarum religionum ("On the error of profane religions").
 
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