Homer and Hesiod both lived in the era after the Dark Age, which later historians have termed the Archaic age (800–500 B.C.E.). The most important political change in this period was the development of the polis (PAH-luhs; plural poleis), a word generally translated as “city-state.” With the polis, the Greeks established a new type of political structure. During the Archaic period, poleis established colonies throughout much of the Mediterranean, spreading Greek culture. Two particular poleis, each with a distinctive system of government, rose to prominence on the Greek mainland: Sparta and Athens.