The founder of the Brahmo Samaj was Raja Ram Mohan Roy. He established the Brahmo Sabha in 1828, which later became known as the Brahmo Samaj. This socio-religious reform movement aimed at promoting monotheism, rationality, and social reforms such as the abolition of idol worship and caste discrimination. Raja Ram Mohan Roy is often regarded as the "Father of Indian Renaissance" due to his significant role in initiating this movement and other social reforms in 19th-century India.