Dorians and Ionians
According to historians, the ancient Greek people were made up of Dorians and Ionians; tribes who migrated from the north into Greece during the Mycenaean Era. The Peloponnese was Dorian while the Attica Peninsula and the western coast of Asia Minor were populated by Ionians. Dorians had their own dialect of Greek and observed their own festival-laden calendar.
Most people who know a little Greek history are familiar with the Dorian and Ionic columns of Greek Architecture.