Before Europeans arrived Panama was widely settled by Chibchan, Chocoan, and Cueva peoples. The largest group were the Cueva (whose specific language affiliation is poorly documented). The size of the indigenous population of the isthmus at the time of European colonization is uncertain. Estimates range as high as two million people, but more recent studies place that number closer to 200,000. Archaeological finds and testimonials by early European explorers describe diverse native isthmian groups exhibiting cultural variety and suggesting people developed by regular regional routes of commerce.