Scythian cultures, also referred to as Scythic cultures, Scytho-Siberian cultures, Early Nomadic cultures, Scythian civilization, Scythian horizon, Scythian world or Scythian continuum, were a group of similar archaeological cultures which flourished across the entire Eurasian Steppe during the Iron Age from approximately the 9th century BC to the 2nd century AD. Among Greco-Roman writers, this region was known as Scythia.