core Hallstatt territory, by the 6th century BC
maximal Celtic expansion, by 275 BC
Two land areas in Iberian Peninsula where Celtic presence is uncertain or disputed by some: Lusitanian and Vettonian land (Para-Celtic?), Caristii and Varduli land (Vasconic, Celtic or Para-Celtic?), in today's Basque Country.
the six Celtic nations which retained significant numbers of Celtic speakers into the Early Modern period
areas where Celtic languages remain widely spoken today
This is a list of ancient Celtic peoples and tribes.