Ancient Greece was a civilization in southern Europe that developed from 1100 BC until it became a Roman province in 146 BC. Its history is categorized into five periods, including the pre-Homeric, Homeric, archaic, classical, and Hellenistic periods, characterized by the rise and fall of city-states like Athens and Sparta. The early formation of the Greek people was influenced by Cretan and Mycenaean cultures, shaped by the arrival of Indo-European peoples around 2000 BC.