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Legacy

In 2016, the Royal Mail marked the centenary of Christie's first detective story by issuing six first-class postage stamps of her works: The Mysterious Affair at Styles, The Murder of Roger Ackroyd, Murder on the Orient Express, And Then There Were None, The Body in the Library, and A Murder is Announced. The Guardian reported that, "Each design incorporates microtext, UV ink and thermochromic ink. These concealed clues can be revealed using either a magnifying glass, UV light or body heat and provide pointers to the mysteries' solutions."

Her characters and her face appeared on the stamps of many countries like Dominica and the Somali Republic. In 2020, Christie was commemorated on a £ 2 coin by the Royal Mint for the first time to mark the centenary of her first novel, The Mysterious Affair at Styles.

In 2023 a life-size bronze statue of Christie sitting on a park bench holding a book was unveiled in Wallingford, Oxfordshire.