The Romaka Siddhanta ("Doctrine of the Romans") and the Paulisa Siddhanta ("Doctrine of Paul") were two works of Western origin which influenced Varahamihir's thought, though this view is controversial as there is much evidence to suggest that it was actually Vedic thought indigenous to India which first influenced Western astrologers and subsequently came back to India reformulated
Further, it considers the role of the law-givers like Manu in establishing the supremacy of the idealist traditions, and how due to the censor and censure anti-idealists like Varahamihira and Brahmagupta worked out their philosophies in distinctive Aesopian language, developing their own modes of camouflaging their ideas.
Later, in the 5th century CE, the term Karnataka was used by the astrologer Varaha Mihira in his work Brihatkatha and the Birur plates of Kadamba Vishnuvarma call Shantivarma The master of the entire Karnataka region.