The upper castes, such as Nairs, Tamil Brahmin migrants, Ambalavasis, St Thomas Christians, as well as backward castes such as Ezhavas had a strong history of Sanskrit learning. In fact many Ayurvedic Physicians (such as Itty Achudan) were from the backward Ezhava community. This level of learning by non-Brahmin learning was not seen in other parts of India. Also, Kerala had been the site of the notable Kerala School which pioneered principles of mathematics and logic, and cemented Kerala's status as a place of learning.