Vedic period
The Kuru kingdom decisively changed the religious heritage of the early Vedic period, arranging their ritual hymns into collections called the Vedas, and developing new rituals which gained their position in Indian civilization as the Srauta rituals, which contributed to the so-called "classical synthesis" or "Hindu synthesis". It became the dominant political and cultural center of the middle Vedic Period during the reigns of Parikshit and Janamejaya, but declined in importance during the late Vedic period (c. 900 – c. 500 BCE) and had become "something of a backwater" by the Mahajanapada period in the 5th century BCE. However, traditions and legends about the Kurus continued into the post-Vedic period, providing the basis for the Mahabharata epic.