The National Gallery's Grand Tour

Gallery staff position A Grotesque Old Woman, attributed to Quinten Massys (c1525-30), into place. The lost original seems to have been based on a drawing after Leonardo da Vinci. It was probably intended to satirise old women who try inappropriately to recreate their youth, rather than as a portrait of a specific person. Photograph: Daniel Berehulak/Getty

Salome receives the Head of Saint John the Baptist outside a sex shop in Soho. The painting by Michelangelo Merisi da Caravaggio is a late work painted in the last three years of his life between 1607-10. It shows Salome, who danced so well for King Herod that he granted her anything she desired, receiving her gift - the head of John the Baptist. Photograph: David Levene/Guardian

Sandro Botticelli's Venus and Mars recline in a covered walkway in London. This work painted around 1485 was probably a piece of bedroom furniture, perhaps a bedhead or piece of wainscoting from a chest or day bed and symbolises that love will conquer all. Photograph: David Levene/Guardian

George Stubbs' Whistlejacket rides high on a wall in Covent Garden. Stubbs's huge picture was painted about 1762 for the 2nd Marquess of Rockingham, Whistlejacket's owner and a great patron of Stubbs. Photograph: David Levene/Guardian

Three Men and a Boy listen in on a lunch-time conversation. The painting, by the Le Nain brothers, is unfinished and thought to depict Antoine, Louis and Mathieu Le Nain (1647-8). Photograph: David Levene/Guardian

Vincent Van Goghs' Sunflowers brighten up a dull corner in Soho. Van Gogh intended to decorate Gauguin's room with his four sunflower paintings in the house that he rented with the painter in the south of France. Photograph: Daniel Berehulak/Getty

A museum guard keeps a watchful eye on Samson and Delilah by Peter Paul Rubens (1609-10). Photograph: David Levene/Guardian

It's hard not to imagine Thomas Gainsborough's Mr and Mrs Andrews a little disgruntled at finding themselves in the urban jungle of Soho's Lexington Street. Photograph: David Levene/Guardian

After the Bath, Woman Drying Herself by Hilaire-Germain-Edgar Degas, 1890-5. Photograph: Daniel Berehulak/Getty

A woman carries shopping bags past Michelangelo's The Entombment (1500-1) which depicts Christ's body being carried to his tomb. Photograph: David Levene/Guardian

A man admires The Virgin of the Rocks by Leonardo da Vinci (c1491-1508). Photograph: David Levene/Guardian

A dog contemplates Four Officers of the Amsterdam Coopers' and Wine-rackers' Guild by Gerbrand van den Eeckhout, 1657. Photograph: David Levene/Guardian

Georges Seurat's London Bathers at Asnieres catch a chill in London's streets. Photograph: David Levene/Guardian