National Gallery, London, UK. 26 October 2017. Monochrome: Painting in Black and White explores the tradition in painting mono over 700 years from the Middle Ages, through the Renaissance, up to the 21st century. The exhibition runs from 30 October 2017 - 18 February 2018. Photo: Exhibition curators Lelia Packer and Jennifer Sliwka in front of Untitled (Rome) 1970 by Cy Twombly. On loan from Private Collection. Credit: Malcolm Park/Alamy Live News.