Lausonius Lacus or Lacus Lausonius was an ancient name referencing a town or region in the country of the Helvetii about Lake Geneva; it was also an ancient name of the lake itself. The Antonine Itinerary describes a road from Mediolanum (modern Milan) through Geneva to Argentoratum (modern Strasbourg). Sixteen Roman miles from Geneva, on the road to Strasbourg, the Itinerary places Equestris (Colonia Equestris or Noviodunum) (modern Nyon); and the next place is Lacus Lausonius, 20 Roman miles from Equestris (approximately 30 km). To the next station, Urba (modern Orbe), is 18 Roman miles (27 km). In the Table the name is "Lacum Losonne", and the distances from Geneva to Colonia Equestris and Lacum Losonne are respectively 18 M.P., or 36 together. The Lacus Lausonius is supposed to be Laus