The Royal Institute of Painters in Water Colours (RI), initially called the New Society of Painters in Water Colours, is one of the societies in the Federation of British Artists, based in the Mall Galleries in London.
Both societies challenged the Royal Academy's refusal to accept the medium of watercolours as appropriate for serious art.
In 1839 Henry Warren (1794–1879) became president of the society and was re-elected for many years until he resigned due to failing eyesight.
When the lease to the Piccadilly premises ran out in 1970, it moved to the Mall Galleries, near to Trafalgar Square.
The premises at 190-195 Piccadilly hosted many exhibitions by other societies and were known simply as "Royal Institute Galleries".