The Collection comprises more than 550 pieces and small collections. The Collection spans more than 250 years and includes a plethora of media – oil paintings, watercolours, pastels, etchings, engravings, prints, textiles, ceramics, sculpture and glass. Many of the works are by local artists and those with a strong Guildford connection. Other pieces have associations with the Guildford area and Surrey. Guildford House Gallery is well known for the many works it owns by Guildford's most famous son John Russell (1745–1806), RA. He was pastel painter to King George III and his son, the Prince of Wales (later George IV). The collection has been built up through gift, bequest and purchase over the past 50 years, and many of its historically most significant works have been acquired with assistance from national and local grant aid. New works are added to the collection every year. The collection is not on continuous display. Instead, the works are integrated carefully into the Gallery's varied exhibition programme.