Boris Anrep (Russian: Борис Васильевич Анреп) (born Boris Vasilyevich Anrep; 27 September 1883 – 7 June 1969) was a Russian mosaicist active in Britain, who devoted himself to the art of mosaic. In Britain, he is known for his monumental mosaics at the National Gallery, London, Westminster Cathedral and the Bank of England. Being close to the Bloomsbury Group, he was a noticeable figure in London social and intellectual life from 1912 up to the mid-1960s. In Ireland, he is known for his mosaics at Christ the King Cathedral, Mullingar. In Russia, he is associated with the Silver Age of Russian Poetry as the addressee of many beautiful poems by Anna Akhmatova, including her Tale of the Black Ring. Anrep was also friendly with Nikolay Gumilyov, an outstanding poet and Akhmatova's husband, and Nikolay Nedobrovo, a talented critic, two prominent figures of the 1910s in Saint Petersburg.