It is no unknown fact that the Brahmo Samaj was established by Raja Rammohun Roy, the great social reformer who helped abolish sati in India. A man given to philosophy, theology and history, to know his ideologies hi better you have to head to the Sadharan Brahmo Samaj Library which has rare books and journals stocked up in its shelves. Though you can’t borrow books, you can definitely sit and read several one of them.
More about it here.