Tantra is an esoteric yogic tradition that developed on the Indian subcontinent from the middle of the 1st millennium CE onwards in both Hinduism and Buddhism.
A Buddhist dhāraṇī (incantation), the Nilaṇṭhanāmahṛdaya dhāraṇī, in Siddham Script with Chinese transliteration
Kushan sculpture of a yakṣiṇī (2nd century), Mathura region
A modern aghori with a skull-cup (Kapala). Their predecessors, the medieval Kapalikas ("Skull-men") were influential figures in the development of transgressive or "left hand" Shaiva tantra.
Dancing Bhairava in the Indian Museum, Kolkata
A mantra or mantram is a sacred utterance, a numinous sound, a syllable, word or phonemes, or group of words believed by practitioners to have religious, magical or spiritual powers. Some mantras have a syntactic structure and a literal meaning, while others do not.
Mantras written on a rock near Namche Bazaar Nepal
Hare Krishna devotees in Amsterdam carrying a poster with the Hare Krishna Mantra
Japanese Mandala of the Mantra of Light, an important mantra of the Shingon and Kegon sects
A Japanese depiction of the Amida Triad as Seed Syllables (in Siddham Script). Visualizing deities in the form of seed mantras is a common Vajrayana meditation. In Shingon, one of the most common practices is Ajikan (阿字觀), meditating on the mantric syllable A.