A National Gallery employee poses for a picture in front of British artist Chris Ofili's tapestry 'The Caged Bird's Song' at the 'Weaving Magic' exhibition at the National Gallery in central London on April 25, 2017. The 'Weaving Magic' exhibition displays the project of creating Chris Ofili's tapestry 'The Caged Bird's Song' and includes prepartory drawings and the tapestry itself presented in an emersive installation at the National Gallery. / AFP PHOTO / Daniel LEAL-OLIVAS