• The disappearance of a jewelled Ottoman dagger which is believed to have once belonged to King Henry VIII has inspired a new exhibition at Strawberry Hill House, Horace Walpole’s former home in Twickenham in London’s west. Henry VIII’s Lost Dagger: From the Tudor Court to the Victorian Stage looks at the history of the 16th century dagger which, said to have been richly decorated with “a profusion of rubies and diamonds”, was once part of Horace Walpole’s collection. When the collection was sold in 1842, the dagger passed into ownership of the Shakespearean actor Charles John Kean who directed private theatricals for Queen Victoria at Windsor Castle. Kean (1811-1868) pioneered what critics dubbed “living museums” on the Victorian stage by using real artifacts, including the dagger, during performances. But after Kean’s death the dagger vanished without a trace. Dr Silvia Davoli, the principal curator at Strawberry Hill House, launched an investigation to find the dagger and instead found six almost identical daggers scattered around the globe. Two of these daggers – known as the Vienna and Welbeck Abbey examples – are featured in the exhibition alongside reproductions of 18th century materials which related to Walpole’s lost dagger from Yale University’s Lewis Walpole Library. The exhibition can be seen from Saturday until 16th February. Admission charge applies. For more, see www.strawberryhillhouse.org.uk.

• The role maps have played in preserving secrets for the benefit of their creators from the 14th century to the present day is the subject of a new exhibition at the British Library. Secret Maps features more than 100 items ranging from hand-drawn naval charts given to Henry VIII to maps of cable networks used to intercept messages between the world wars; and the satellite tracking technology used by apps today. Among highlights are a map from 1596 attributed to Sir Walter Raleigh on an expedition in search of the mythical city of El Dorado in what is now Guyana in South America; a map produced in 1946 of British India (modern-day India, Pakistan and Bangladesh) with a ‘top secret’ report investigating the potential economic and military impact of partition for the proposed state of Pakistan; one of only two known existing copies of a secret map produced by Ordnance Survey during the General Strike of 1926 amid fears of a public uprising; and a 1927 Cable Map of the world which reveals a global network of censorship stations and was used by the British government to intercept messages sent via submarine and overland cables. Runs until 18th January (and accompanied by a programme of events). Admission charge applies. For more, see https://events.bl.uk/exhibitions/secretmaps.

• Staffordshire-based artist Peter Walker’s large scale interactive artworks, Connection and Identity, can be seen in the Painted Hall at the Old Royal Naval College in Greenwich from Friday. Identity features eight columns suspended within the hall which shift in colour and light while Connection showcases “a dramatic and modern reinterpretation of Michelangelo’s Creation of Adam“. The installation, which is located in the hall sometimes described as “Britain’s Sistine Chapel”, is accompanied by music specially composed by David Harper. Runs until 25th January. Admission charge applies. For more, see https://ornc.org/whats-on/connection-and-identity/.

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