The Islamic conquest of India started in the 8th century.
It was summed up by historian Will Durant in his famous line: “The Islamic conquest of India is probably the bloodiest story in history".
The oldest archaeological site attributed to this civilization is Bhirrana(7570 BCE), located in mordern day Indian state of Haryana and the largest site being Rakhigari, Haryana.
The practice of Buddhism, in particular, disappeared from India's heartland, though Buddha himself was incorporated into the Hindu pantheon.
Jainism continues to be practiced by a significant number who are ambivalent about whether they consider themselves Hindus or not. The importance of Vedic deities like Indra and Agni reduced and Puranic deities like Vishnu, Shiva, their various Avatars and family members gained prominence.
By tradition, these books claim to only expand and distil the knowledge that is already present in the Vedas.
Some rituals of Hinduism took shape during that period.
Indians are known for their greeting to thir guest, "अतिथि देवो भवः" Atithi devo bhava meaning "Guest is God".