Vastu-shastra (Vol. I: Hindu Science of Architecture; Vol. II: Hindu Canons of Iconography and Painting) v2.c75.s3.18

v2.c75.s3.18

Now a word on the iconographical representation of Ādi Buddha, the highest deity of the Vajrayāna and also originator of the five Dhyāni Buddhas, may also be added here. When represented in human form he begets the name of Vajradhara and is conceived in two forms single and yab-yum. It may further be remarked that the conception of Ādi Buddha became controversial among the Vajrayānists themselves. Some considered Akṣobhya and some others of the other Dhyāni Buddhas as the Ādi Buddha and so these differences also were brought to bear upon their representations in sculptures.