B. K. S. Iyengar Bellur Krishnamachar Sundararaja Iyengar ( 14 December 1918 -- 20 August 2014 ) , better known as B.K.S. Iyengar , was the founder of the style of yoga known as `` Iyengar Yoga '' and was considered one of the foremost yoga teachers in the world .
B. K. S. Iyengar B. K. S. Iyengar , or Bellur Krishnamachar Sundararaja Iyengar ( December 14 , 1918 - August 20 , 2014 ) was an Indian yoga teacher and writer . He founded the style of yoga known as `` Iyengar Yoga '' .