• A new exhibition exploring how fashion survived and even flourished during World War II has opened at the Imperial War Museum in Lambeth to mark the 70th anniversary of the war’s end. Fashion on the Ration brings together more than 300 exhibits including clothes and accessories like the ‘respirator carrier handbag’, photographs and films as well as official documents from the period, letters and interviews. The exhibition is divided into six parts which examine in detail everything from the uniforms worn during the period to clothes rationing (introduced in 1941) and how the end of the war impacted fashion. Runs until 31st August. Admission charge applies. For more, see www.iwm.org.uk.

• The UK’s first major exhibition devoted to Paul Durand-Ruel, the man who “invented Impressionism”, has opened at the National Gallery off Trafalgar Square this week. Inventing Impressionism features around 85 works including some of Impressionism’s greatest masterpieces, a number of which have never been seen in the UK before. The majority of the works were traded by Durand-Ruel (1831-1922) who is noted for having discovered and supported Impressionist painters like Monet, Pisarro, Degas and Renoir. Durand-Ruel purchased an astonishing 12,000 pictures between 1891 and 1922, including more than 1,000 Monets, about 1,500 Renoirs, more than 400 Degas’, some 800 Pissarros and close to 200 Manets. The images on display include a series of rarely-seen portraits of the dealer and his family by Renoir which are being exhibited in the UK for the first time as well as five paintings from Manet’s ‘Poplars’ series and all three of Renoir’s famous ‘Dances’, not seen in the country together since 1985. The exhibition finishes with a reference to an exhibition Durand-Ruel organised in London in 1905. Held at the Grafton Galleries, it presented 315 paintings. Admission charge applies. Runs until 31st May. For more, see www.nationalgallery.org.uk.

• Gift Horse, New York-based German artist Hans Haacke’s sculpture of a skeletal riderless horse, will be unveiled on the Fourth Plinth in Trafalgar Square today. The horse, derived from an etching by English painter George Stubbs – whose works are in the nearby National Gallery, features an electronic ribbon tied to the horse’s front leg showing a live ticker of the London Stock Exchange. The statue, described as a ‘wry comment’ on the equestrian statue of King William IV which was originally to occupy the plinth, is the 10th to occupy the plinth since the first commission – Marc Quinn’s sculpture Alison Lapper Pregnant – was unveiled in 2005.

•  Contemporary artist Dryden Goodwin’s first feature-length film is on show as part of a new exhibition, Unseen: The Lives of Looking, at the Queen’s House in Greenwich. Continuing Goodwin’s investigations into portraiture, the newly commissioned film focuses on three individuals who have a “compelling” relationship to looking – eye surgeon Sir Peng Tee Khaw, planetary explorer Professor Sanjeev Gupta and human rights lawyer Rosa Curling. Alongside the screening is a series of drawings made by Goodwin after observing the three individuals as well as tools and papers related to each of their trades and a series of objects connected three leading observers related to the history of the Royal Museums Greenwich sites – John Flamsteed, first Astronomer Royal, Edward Maunder, who observed Mars from the Royal Observatory Greenwich, and the artist Willem van de Velde the Elder who made detailed drawings of naval battles in preparation for producing paintings in his studio at the Queen’s House. Runs until 26th July. Admission is free. For more, see www.rmg.co.uk.

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