"He was well known as one of the foremost yoga teachers in the world. He is credited with establishing and popularising modern yoga first in India and then across the world. He created a unique school of yoga popularly known as ‘Iyengar Yoga’ and authored several books on yoga practice and philosophy which are considered authoritative texts used by practitioners, young and old."
January 1, 1970
https://en.wikiquote.org/wiki/B._K._S._Iyengar