Answer:
a mountain range in central Europe that separated the Holy Roman Empire and the Byzantine Empire. Today it extends through Poland and Hungary.
Explanation:
Carpathian Mountains acted as barriers to travelers and traders, and as protection. Byzantine Empire - had a different leader.
The Carpathian Mountains are the second longest mountain system in Europe covering an area of about 210,000 square kilometers. Seven countries (Czech Republic, Hungary, Poland, Romania, Serbia, Slovak Republic, and Ukraine) share the territory of the Carpathian region, five of them are EU members.
