Ancient Greek human settlements began as small villages along the coasts and islands of the Mediterranean and Black Seas. Notable early civilizations included the Minoans of Crete, known for their palace at Knossos. Greeks later established city-states like Athens and Sparta between 800-600 BC, centered around fortified hilltop acropolises. The Classical Period from the 5th to 4th centuries BC marked Greece's cultural and artistic peak, exemplified by structures on the Athenian Acropolis such as the Parthenon. However, Greek city-states eventually fell under Roman rule after wars in the 2nd century BC.