Sahasrāra or the Crown Chakra is considered the seventh primary chakra in Indian spiritualistic yoga traditions. The chakra is represented by the colour violet.
Brahmin (practising pranayama) with tuft of hair at the Bindu Visarga
Sahasrāra used as roof-architecture in a Temple in Tamil Nadu
A chakra is a meditation-aid in the form of a psychic or psychospiritual energy-center in the subtle body, as visualized in a variety of Hindu and Buddhist tantric yoga and meditation practices.
Sahasrara
…सहस्रार, IAST: Sahasrāra, English: "thousand-petalled", with many alternative names and spellings) or the Crown Chakra is considered the seventh primary chakra in Indian spiritualistic yoga traditions. The chakra is represented by the colour violet. The Sahasrāra is described in a few medieval hatha yoga texts…
Chakra iconography may derive from the five symbols of yajna, the Vedic fire altar.
Sapta Chakra, an 1899 manuscript, illustrates the esoteric correspondence(s) between subtle energy and Tibetan psycho-physiology.
An illustration of a Shaiva Nath chakra system, folio 2 from the Nath Charit, 1823. Mehrangarh Museum Trust.
A Tibetan illustration of the subtle body showing the central channel, two side channels, and five chakras