No archaeological evidence that indicates a settlement on the site of today's city centre prior to the 12th century has been found so far. In antiquity, a Celtic ''oppidum'' stood on the ''Engehalbinsel'' (peninsula) north of Bern, fortified since the second century BC (late La Tène period), thought to be one of the 12 ''oppida'' of the Helvetii mentioned by Caesar. During the Roman era, a Gallo-Roman ''vicus'' was on the same site. The Bern zinc tablet has the name ''Brenodor'' ("dwelling of Breno"). In the Early Middle Ages, a settlement in Bümpliz, now a city district of Bern, was some  from the medieval city.