A Norfolk landmark has been lit up by projections of artworks by Vincent van Gogh, LS Lowry and others.
Norwich Castle was used to mark the completion of the BBC's Your Paintings project to collect all the UK's 211,861 publicly-owned oil paintings online.
Saul Nassé, controller of BBC Learning, said: "The idea that we could put on virtual display all these paintings was madly ambitious."
A month of exhibitions and events will now take place across the UK.
Other paintings to be projected onto the Norwich city centre building were by artists including Beryl Cook, Thomas Gainsborough, David Hepher, Frances Broomfield and Harold C Harvey.
Andrew Ellis, from the Public Catalogue Foundation, which was also involved in the project, said: "No other country has ever embarked on such a project to make accessible online its entire collection of oil paintings.
"The result is an extraordinary rich and varied virtual gallery with styles and subject matters to suit all tastes and interests."
Elsewhere in the UK , 28 landmarks took part in the projection project including Clifford Tower in York and the National Gallery in London.