Above the Great West Door of the Westminster Abbey are the Ten Christian Martyrs of the 20th century. These victims of religious and political persecution represent every continent. The figure in the middle is Martin Luther King Jr. The tribute was unveiled in the presence of Queen Elizabeth II and her husband, The Duke of Edinburgh, in 1998. Apparently, these niches had been empty since the Middle Ages. Andrew Tanser sculpted the statues from French Richemont limestone. The ensemble is an impressive entry into the UNESCO World Heritage Site.