A cultural boundary (also cultural border) in ethnology is a geographical boundary between two identifiable ethnic or ethnolinguistic cultures. A
language border is necessarily also a cultural border, as language is a significant part of a society's culture, but it can also divide subgroups of the same ethnolinguistic group along more subtle criteria, such as the
Brünig-Napf-Reuss line in German-speaking Switzerland, the
Weißwurstäquator in Germany, or the
Grote rivieren boundary between Dutch and
Flemish culture. The following major cultural boundaries are found in the
history of Europe: • in
Western Europe: between
Latin Europe, where the legacy of the
Roman Empire remained dominant, and
Germanic Europe, where it was significantly syncretized with
Germanic culture • in the Balkans: the
Jireček Line, dividing the area of dominant Latin (
Western Roman Empire) from that of dominant Greek (
Eastern Roman Empire) influence. Macro-cultures on a continental scale are also referred to as "worlds", "spheres", or "civilizations", such as the
Islamic world. ==Specialized terms==