The Ādi-Buddha is a Mahayana Buddhist concept referring to the most fundamental, supreme, or ancient Buddha in the cosmos. Another common term for this figure is Dharmakāya Buddha.
Vajradhara, the main Ādibuddha, depicted in the Sarma (New Translation) schools of Tibetan Buddhism
A painting depicting Samantabhadra in union with his consort Samantabhadri.
12th century painting of Mahāvairocana, Heian period, collecting in Nezu Museum
In Buddhism, Buddha is a title for those who are spiritually awake or enlightened, and have thus attained the supreme goal of Buddhism, variously described as awakening or enlightenment, Nirvāṇa, and
Adi-Buddha
…term emerges in tantric Buddhist literature, most prominently in the Kalachakra. "Ādi" means "first", such that the Ādibuddha was the first to attain Buddhahood. "Ādi" can also mean "primordial", not referring to a person but to an innate wisdom that is present in all sentient beings. In East Asian Buddhism…
Buddha Śākyamuni, in Greco-Buddhist style, c. 1st–2nd century CE, Gandhara
A classic Sukhothai-style Buddha statue
Buddha statue on the upper floor of Ajanta Cave No. 6. These caves are associated with the Mahāsāṃghika school.