Raja Ram Mohan Roy and Debendranath Tagore
Brahmo Samaj is a Hindu reform movement. It is the societal component of Brahmoism, a monotheistic reformist movement of Hindu religion that appeared during the Bengal Renaissance.
It was one of the most influential religious movements in India and made a significant contribution to the making of modern India. It was started at Calcutta on 20 August 1828 by Raja Ram Mohan Roy and Debendranath Tagore as reformation of the prevailing Brahmanism of the time (specifically Kulin practices) and began the Bengal Renaissance of the 19th century pioneering all religious, social and educational advance of the Hindu community in the 19th century.
The Brahmo Samaj literally denotes community of men who worship Brahman the highest reality. In reality Brahmo Samaj does not discriminate between caste, creed or religion and is an assembly of all sorts and descriptions of people without distinction, meeting publicly for the sober, orderly, religious and devout adoration of "the (nameless) unsearchable Eternal, Immutable Being who is the Author and Preserver of the Universe."