The Royal Watercolour Society (originally called the Society of Painters in Water Colours, briefly the Society of Painters in Oil and Watercolours, and for much of its existence the Royal Society of Painters in Water Colours) is an English institution of painters working in watercolours. It should not be confused with the separate organisation, the Royal Institute of Painters in Water Colours. The Royal Watercolour Society is a UK centre of excellence for water based media on paper, which allows for a diverse and interesting range of approaches to the medium of watercolour. The Society's offices are at Bankside Gallery in London.