Former populated places in Switzerland

archaeological site and former Roman colony town on the southern bank of the Rhine near Augst in the canton of Basel-Land, Switzerland

thumb|300px|Switzerland during the Roman era, showing Aventicum and the Helvetii region thumb|Carved limestone objects from Aventicum

thumb|250px|right|Lousonna Lousonna (also Lousanna) is a Roman archaeological site in Switzerland. It preceded the present-day city of Lausanne.

archaeological site in Nyon in the canton of Vaud, Suisse