Dharma Sabha Wikipedia
Dharma Sabha was formed in 1830 in Calcutta. The organization was established mainly to counter the ongoing social reform movements led by protagonists such as Raja Ram Mohun Roy and Henry Derozio. More specifically, the impetus of forming the organization came from a new law enacted by the colonial Government which banned the practice of Sati in the country; the focus of the new association was to repel the law which seen as an intrusion of the Government into the religious affairs of the indigenous people by some sections of the Hindu community.
The organization soon morphed into a 'society in defense of Hindu way of life or culture'.