The document describes the migrations of the Celts from around 1500 BCE to 150 BCE. It starts with the Kurgan culture in the North Pontic region from around 5000 to 1400 BCE. It then notes that the area around the Hartz Mountains in around 1500 to 1200 BCE is considered the original home of the Celts. The document traces the migrations of the Celts from around 800 BCE to 500 BCE and then from 500 to 150 BCE, originating from the Hartz Mountains region.