On this day in 1866 the Brahmo community in Calcutta, still in its early years, officially broke up, with one of its young leaders, Keshab Chandra Sen, setting up another branch of the community.
A difference of opinion on the importance of integrating elements of Christianity, advocated by Sen, had distanced him from Debendranath Tagore, one of the founding members of the Brahmo movement. In November 1866, Sen founded Bharatbarshiya Brahmo Samaj (Brahmo Samaj of India). At that time it had 54 community members in India. The branch that was led by Tagore distinguished itself as Adi Brahmo Samaj.