Tantra (Sanskrit: तन्त्र, "loom, warp"; hence "principle, system, doctrine, theory", from the verbal root tan "stretch, extend, expand", and the suffix tra "instrument"), anglicised as tantrism or tantricism, is the name scholars give to a style of religious ritual and meditation that arose in medieval India no later than the fifth century CE, and which came to influence all forms of Asian religious expression to a greater or lesser degree. Strictly speaking, this usage of the word "tantra" is a scholarly invention, but it is justifiable on the basis of the fact that the scriptures that present these practices are generally known as "tantras", regardless of which religion they belong to.

The historical significance of the Tantric method lies in the fact that it impacted every major Asian religion extant in the early medieval period (c. 500 - 1200 CE): thus Shaivism, Buddhism, Vaishnavism, and Jainism all developed a well-documented body of Tantric practices and related doctrines. Even Islam in India was influenced by Tantra. Tantric ideas and practices spread far outside of India, into Tibet, Nepal, China, Japan, Cambodia, Vietnam, and Indonesia. Today, it is Tibetan Buddhism and various forms of Hinduism that show the strongest Tantric influence, as well as the international postural yoga movement and most forms of American alternative spirituality grouped under the New Age rubric.

Ravi Shankar (Bengali: রবি শংকর; born Robindro Shaunkor Chowdhury on 7 April 1920), often referred to with the title Pandit, is an Indian musician and composer who plays the plucked string instrument sitar. He has been described as the most known contemporary Indian musician by Hans Neuhoff in Musik in Geschichte und Gegenwart.

Shankar was born in Varanasi and spent his youth touring Europe and India with the dance group of his brother Uday Shankar. He gave up dancing in 1938 to study sitar playing under court musician Allauddin Khan. After finishing his studies in 1944, Shankar worked as a composer, creating the music for the Apu Trilogy by Satyajit Ray, and was music director of All India Radio, New Delhi, from 1949 to 1956.

In 1956, he began to tour Europe and America playing Indian classical music and increased its popularity there in the 1960s through teaching, performance, and his association with violinist Yehudi Menuhin and George Harrison of The Beatles. Shankar engaged Western music by writing concerti for sitar and orchestra and toured the world in the 1970s and 1980s. From 1986 to 1992 he served as a nominated member of the upper chamber of the Parliament of India. Shankar was awarded India's highest civilian honor, the Bharat Ratna, in 1999, and received three Grammy Awards. He continues to perform in the 2000s, often with his daughter Anoushka.