Varahamihir.

 Varāhamihira, also called Varāha or Mihira, was an ancient Indian astrologer, astronomer, and polymath who lived in Ujjain. He was born at Kayatha, in the Avanti region, roughly corresponding to modern-day Malwa, to Adityadasa. According to one of his own works, he was educated at Kapitthaka. 

Varāhamihira's most notable works were the Brihat Samhita, an encyclopedic work on architecture, temples, planetary motions, eclipses, timekeeping, astrology, seasons, cloud formation, rainfall, agriculture, geology, mathematics, perfumes and many other topics. According to Varahamihira, in some verses he was merely summarizing earlier existing literature on astronomy, Shilpa Sastra and temple architecture, yet his presentation of different theories and models of design are among the earliest texts that have survived. The chapters of the Brihat Samhita and verses of Varahamihira were quoted by the Persian traveler and scholar al biruni. 

Varāhamihira is also credited with writing several authoritative texts on astronomy and astrology. He learned the Greek language, and praised the Greeks (Yavanas) in his text for being "well trained in the sciences". Some scholars consider him to be the strong candidate as the one who understood and introduced the zodiac signs, predictive calculations for auspicious ceremonies and astrological computations.