Vishnu Devananda
Vishnudevananda Saraswati (31 December 1927 – 9 November 1993) was a disciple of Sivananda Saraswati, and founder of the International Sivananda Yoga Vedanta Centres and Ashrams. He established the Sivananda Yoga Teachers' Training Course, one of the first yoga teacher training programs in the West. His books The Complete Illustrated Book of Yoga (1960) and Meditation and Mantras (1978) established him as an authority on Hatha and Raja yoga. Vishnudevananda was an activist who rode in several "peace flights" over places of conflict, including the Berlin Wall prior to German reunification.