Hatti civilization (2500-2000 BC)
The people known as Hattis are amongst the oldest settlers in Anatolian history. They ruled Central Anatolia for about 500 years. Small city kingdoms were their favorite type of settlement units. They spoke a totally different language than the other influential Anatolian civilizations. There are signs of Mesopotamian influence on Hatti art and culture.
They believed in a number of gods representing various acts of nature in the form of animals. Some statues of their most popular gods are on exhibition in major museums of Turkey.
Hatti and the Hittite Principalities Period (2000-1750 BC)
By the end of the 3rd millennium BC a large scale migration took place mainly from North Europe to the mild weathered south. One of the strong elements of the Indo-European people, the Hittites gravitated to Anatolia through Caucasia while Hatti principalities were ruling the land.
These newcomers did not invade the land suddenly. They settled along side the existing people and set their own settlement units in time. Only after a long time, as a lot of Hittite principalities emerged, they claimed the rule of the land, Anatolia. They never destroyed the existing people and their cities, but instead, they mixed with the Hattis and other people of Anatolia. They even shared their gods, goddesses, art, culture and a large amount of words from Hatti language.