Photo taken on April 25, 2017 shows detail of a piece called "The Caged Bird Song" by Turner Prize winning artist Chris Ofili at the National Gallery in London, Britain. It is a tapestry hand woven by the Dovecot Tapestry Studio which took two and a half years to complete. The tapestry is displayed in a room with a portico covering the walls. (Xinhua/Tim Ireland)
