The Etruscan civilization is from Italy.
 A recent thought experiment, the silurian hypothesis, however, considers whether it would "be possible to detect an industrial civilization in the geological record" given the paucity of geological information about eras before the quaternary
 The first gold artifacts in the world appear from the 4th millennium BC, such as those found in a burial site from 4569 to 4340 BC and one of the most important archaeological sites in world prehistory  the Varna Necropolis near Lake Varna in Bulgaria, thought to be the earliest "well-dated" find of gold artifacts

