Romaka Siddhanta

The Romaka Siddhanta (literally "Doctrine of the Romans") is one of the five siddhantas mentioned in Varaha Mihira's Panchasidhantika which is an Indian astronomical treatise. Romaka Siddhanta is based on the astronomical learning of Byzantine Rome. "Siddhanta" literally means "Doctrine" or "Tradition."

It follows the Yavanajataka ("Natal Astrology of the Yavana (Greek)") as an example of the transmission of Greek and Roman astronomical knowledge (especially the Alexandrian school) to India during the first centuries of our era.

The Romaka Siddhanta was influential on the work of the Indian astronomer Varahamihira. It is the only one of all Indian astronomical works which is based on the tropical system. It was considered as one of "The Five Astronomical Canons" in Indian in the 5th century.

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