Athens is the capital city of Greece. It is one of the most famous cities in the world. Scholars disagree on whether the city is named for the goddess Athena, or the goddess for the city. Athens has a population of about 4 million people and is growing. It is in the prefecture, or division of the country, of Attica. It has a borderline cold semi-arid climate ("BSk" in the Köppen climate classification) and a hot-summer Mediterranean climate ("Csa" in the Köppen climate classification). The average rainfall is relatively low, due to the rain shadow from the Parnitha mountains. Frost is infrequent and snow does not occur every winter.