The ancient city of Hattusha was founded in 3000 BC. Hattusha city was founded by the kingdom of Hatti. In later years, the city of Hattusha was conquered by the Assyrian kingdom. But after the short time the Hittite kingdom conquered Hattusha. And Hattusash was been the capital of the Hittite kingdom. Therefore, many new buildings and investments were made by the Hittites to the city of Hattusas. Later, the city of Hattusash was conquered by Phrygian, Galatian, Roman, Byzantine and Turkish states respectively.