1855 : Keshub Chunder Sen founds "The British India Society" later associated with Christian missionaries James Long and Charles Dall.
Brahmo Samaj or Brahmoism a Bengali religious movement by Ram Mohan Roy
He joined a new religion called Brahmo Dharma / Brahmoism Adi Brahmo Samaj faction in Calcutta around 1906, and he is reverentially called Gurudev or Guru Brahma by Bodo people of lower plains of Assam along holy Brahmaputra river.