Lousonna (also Lousanna) is a Roman archaeological site in Switzerland. It preceded the present-day city of Lausanne. The Romans built a military camp on this spot, which they called Lousonna, at the site of a Celtic settlement near Lake Geneva. Gallery See also Switzerland in the Roman era References External links Page on the website of the City of Lausanne Lausanne Roman Museum Archaeological sites in Switzerland Roman towns and cities in Switzerland Coloniae (Roman) Lausanne Former populated places in Switzerland Buildings and structures in the canton of Vaud Tourist attractions in the canton of Vaud