The Public Catalogue Foundation.
The UK’s Oil Painting Collection
The United Kingdom holds in its galleries and civic buildings arguably the greatest publicly owned collection of oil paintings in the world. 200,000 publicly owned oil paintings are held in institutions ranging from museums large and small to town halls, universities, hospitals and even fire stations.
However, four in five of these paintings are not on view. Whilst many galleries make strenuous efforts to display their collections, many paintings across the country are held in storage, usually because there are insufficient funds and space to show them. Furthermore, very few galleries have created a complete photographic record of their paintings, let alone a comprehensive illustrated catalogue of their collections. In short, what is publicly owned is not publicly accessible.
via The Public Catalogue Foundation.