Native inhabitants of the Alps were naturally the first to use the passes. The passes first became known to the outside world when the Romans crossed them to raid or conquer the region beyond. Romans, once having found an easy way across the chain, did not trouble to seek for harder and more devious routes. Hence, passes that can be shown as certainly known to them are relatively few in number: they are, in topographical order from west to east, the Col de l'Argentiere, the Col de Montgenèvre, the col du Mont Cenis, the two St Bernard passes (Little St Bernard Pass and Great St. Bernard Pass), the Splügen Pass, the Septimer Pass, the Reschen Pass, the Brenner Pass, the Plöcken Pass, the Pontebba Pass (or Saifnitz Pass), the Radstädter Tauern Pass and the Solkscharte Pass or Sölk Pass.