The National Gallery of Australia exhibits a great many indigenous art works, including those of the Torres Strait Islands who are known for their traditional sculpture and headgear. The Art Gallery of New South Wales has an extensive collection of indigenous Australian art. In May 2011, the Director of the Place, Evolution, and Rock Art Heritage Unit (PERAHU) at Griffith University, Paul Taçon, called for the creation of a national database for rock art. Paul Taçon launched the "Protect Australia’s Spirit" campaign in May 2011 with the highly regarded Australian actor Jack Thompson. This campaign aims to create the very first fully resourced national archive to bring together information about rock art sites, as well as planning for future rock art management and conservation. The National Rock Art Institute would bring together existing rock art expertise from Griffith University, Australian National University, and the University of Western Australia if they were funded by philanthropists, big business and government. Rock Art Research is published twice a year and also covers international scholarship of rock art.