Brahmo Samaj: founded in Calcutta by Ram Mohan Roy on 20 August, 1828; Paramhansa Mandali : a secret socio-religious group, established in 1849, in Bombay by Dadoba Panderung; Arya Samaj: founded by Dayanand Saraswati on 10 April, 1875; Ramakrishna Mission: founded by Swami Vivekananda on 1 May, 1897.