Cultural property can be divided into several categories and ancillary issues. There is the "real property," comprised of the land, the bones and ceremonial burial items of the ancestors, and other artifacts recovered in the exploration of past civilizations (and current ones too!). Then there is the intellectual property, the ideas and practices, the languages, the music and the writings. The protection of these properties and the way in which indigenous cultures can deal with the people outside their culture who wish to learn about these things, whether for academic reasons or for their own reasons, are dealt with here.