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Salvator Mundi (c. 1500), Leonardo da Vinci. Christie's
Detail of an X-ray showing the portrait of a woman believed to be Mary, Queen of Scots, underneath Adrian Vanson's portrait of Sir John Maitland.
A picture taken on 12 October, 2017 shows the logo of the UNESCO headquarters in Paris. The United States and Israel have both announced their intention to withdraw from the organisation. JACQUES DEMARTHON/AFP/Getty Images
The Forge of Vulcan (detail; 17th century), attributed to Ary de Vois. Abingdon Guildhall
Three soldiers (from the Flagellation of Christ; 1360), Master of Agrafen, or a follower.
Miss Everything (Unsuppressed Deliverance) (detail; 2013), Amy Sherald. Frances and Burton Reifler. © Amy Sherald
Salvator Mundi (c. 1500), Leonardo da Vinci. Christie's
The Neues Palais, Potsdam in Sanssouci Park, PATRICK PLEUL/AFP/Getty Images
Frescoes in the Criptoporticus Domus, restored as part of the Great Pompeii Project, December 2015, MARIO LAPORTA/AFP/Getty Images
The Colosseum Seen from the Southeast, (c. 1700), Gaspar van Wittel, Harvard Art Museums/Fogg Museum, Photo: Imaging department; Harvard Art Museums/Fogg Museum. Photo: Imaging department; © President and Fellows of Harvard College
Artwork on concrete blocks acting as bollards on 4 July, 2017 in Melbourne, Australia. Photo: Michael Dodge/Getty Images
Gillian Wearing with a model of suffragist leader Millicent Fawcett, Photo: Caroline Teo/GLA/PA
Letters from W.B. Yeats to Olivia Shakespear, part of the Yeats Family Collection be auctioned at Sotheby's London on 27 September
Illustration: The Lindström Effect
View of Zeitz MOCAA in Silo Square. Photo: Iwan Baan
Georgian watch winder with moulded figures on either side, discovered on the Thames foreshore. Photo: Florence Evans
The opening reception at the 15th Istanbul Biennial
Hartwig Fischer in 2015. Photo: Sean Gallup/Getty Images
The double entrance gateway to the Aleppo Citadel, largely the work of the late 12th century Ayyubid rulers of Aleppo (pictured here on 9 March, 2017) has largely survived the conflict with only minor damage. Photo: JOSEPH EID/AFP/Getty Images
Image: Tom Lobo-Brennan