Lahiri Mahasaya, was an Indian yogi, guru and a disciple of Mahavatar Babaji. He was also popularly known as Yogiraj and Kashi Baba. He revived the yogic science of Kriya Yoga when he learned it from Mahavatar Babaji in 1861.
Mahavatar Babaji is a great Siddha Yogi, was named Nagarajan (king of serpents) by his parents was born on 30 November 203 CE in a small coastal village now known as Parangipettai, Cuddalore district of Tamil Nadu, India.