Durrës is the second largest city in Albania, located on the Adriatic Sea. Founded by Greek colonists in the 7th century BC as Epidamnos, it later came under Roman and Byzantine rule. During this time, it developed significantly as a military, naval, and economic center. Today, Durrës remains an important port city and is home to several historical and cultural sites, most notably its well-preserved 5th century Byzantine city walls and the largest amphitheater in the Balkans.