The National Portrait Gallery has closed for the dayThe National Portrait Gallery is to close for a day following an “unexpected” power outage. A statement from the gallery read: “Due to an unexpected power outage, we have unfortunately had to close the National Portrait Gallery today until further notice. “This includes the exhibition Marilyn Monroe: A Portrait and The Portrait Restaurant. “All affected ticketholders should contact the National Portrait Gallery contact centre (info@npg.org.uk/020 7306 0055) to exchange their ticket for another day or receive a refund. Founded in 1856, the National Portrait Gallery is located in London’s St Martin’s Place, with some of its best known works on permanent display including the Chandos portrait of William Shakespeare, the Ditchley portrait of Queen Elizabeth I by Marcus Gheeraerts The Younger, and the Bronte Sisters by their brother Patrick Branwell Bronte.