Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Upper Middle Rhine Valley' has mentioned 'Prehistoric' in the following places:
Occurrence Sentence Text Source
The river has been an important trade route into central Europe since prehistoric times and a string of small settlements has grown up along the banks.
As a transport route, the Rhine has served as a link between the southern and northern halves of the continent since prehistoric times, enabling trade and cultural exchange, which in turn led to the establishment of settlements.