Key periods of ancient Greek history include:
1. Minoan Civilization (2700–1500 BC): The Minoan civilization flourished on the island of Crete and is known for its advanced culture and art.
2. Mycenaean Civilization (1600–1100 BC): The Mycenaeans were a warrior society that ruled much of mainland Greece.
3. Dark Ages (1100–800 BC): A period of decline and limited information about Greek history.
4. Geometric Period (900–750 BC): Marked by the development of geometric art in pottery and metalwork.
5. Archaic Period (750–480 BC): A time of economic growth, colonization, and the rise of city-states like Athens and Sparta.
6. Classical Period (480–323 BC): This period saw the peak of Greek culture and achievements, including the Golden Age of Athens.
7. Hellenistic Period (323–146 BC): The Hellenistic period began with Alexander the Great's conquests and the spread of Greek culture into Asia and North Africa.
Therefore, it has been approximately 3,000 years since ancient Greece.