The Coldrum Long Barrow, also known as the Coldrum Stones and the Adscombe Stones, is a chambered long barrow located near to the village of Trottiscliffe in the south-eastern English county of Kent. Constructed circa 4000 BCE, during Britain's Early Neolithic period, today it survives only in a ruined state.Archaeologists have established that the monument was built by pastoralist communities shortly after the introduction of agriculture to Britain from continental Europe.