Cave Outback Paintings are on walls and ceilings, and the term is used especially for those dating to times. The earliest known European cave Outback Paintings date to , some 32,000 years ago. The purpose of the paleolithic cave Outback Paintings is not known. The evidence suggests that they were not merely decorations of living areas, since the caves in which they have been found do not have signs of ongoing habitation. Also, they are often in areas of caves that are not easily accessed. Some theories hold that they may have been a way of communicating with others, while other theories ascribe them a religious or ceremonial purpose.