Stonehenge is one of the most famous neolithic (Stone Age) monuments in the world.
The site includes the stone circle itself, but also hundreds of other prehistoric monuments scattered around the area.
It's a Prehistoric monument - meaning it was built before the invention of writing.
It's from the earliest period of Prehistory, the Stone Age, which predates the Bronze Age and Iron Age.
It's from the latest period of the New Stone Age (the Neolithic), which postdates the Old Stone Age (Paleolithic) and Middle Stone Age (the Mesolithic).
During the first phase of the Stone Age, the Paleolithic, humans were nomadic hunters, following large herds of wild animals across the tundra.
Britain had a very harsh climate and was rarely inhabited.