Acharya Shri Shantisagar (1872–1955) was an Indian monk of the Digambara school of the Jain faith. He was the first Acharya (preceptor) and a leader of his sect in the 20th century. Shanti Sagar ji revived the teaching and practice of traditional Digambara practices in North India. He was lustrated as a kshullaka into the Sangha (holy order) by Devappa (Devakirti) Swami. He took his ailaka deeksha (religious vows) before an image of the Tirthankara Neminatha. In about 1920, Shantisagar became a full muni (monk) of the Digambara sect of Jainism. In 1922, at Yarnal village, Belgaum district, Karnataka, he was given the name "Shanti Sagara" ("Ocean of Peace").