Śivaliṅga is one of the most ancient symbols of God that is still being worshipped in India. Liṅgas have been discovered in other countries also, especi-ally in Mexico and South East Asia.
Out of the two types of liṅgas, the cala (the movable) and the acala or the sthāvara (the immovable), the latter is classified under nine heads. The ‘ārṣa-liṅga’ is one among them. It is defined as the liṅga set up and worshipped by ṛṣis or sages. Ārṣa-liṅgas are usually spheroidal in shape, resembling an unhusked coconut fruit, and do not have the brahma-sūtra mark on them.