Kerala had been a notable centre of Vedic learning, having produced one of the most influential Hindu philosophers, Adi Shankaracharya. The Vedic learning of the Nambudiris is an unaltered tradition that still holds today, and is unique for its orthodoxy, unknown to other Indian communities. However, in feudal Kerala, though only the Nambudiris received an education in Vedas, other castes as well as women were open to receive education in Sanskrit, mathematics and astronomy, in contrast to other parts of India.