While the movement has become increasingly mainstream, the roots of shock art run deep into art history; Royal Academy curator Norman Rosenthal noted in the catalog for the "shock art" exhibition Sensation in 1997 that artists have always been in the business of conquering "territory that hitherto has been taboo". In China, which experienced an active "shock art" movement following the Tiananmen Square protests of 1989, encroachment on the taboo has led the Ministry of Culture to attempt a crackdown on the artform, banning the use of corpses or body parts in art.