Decline of Buddhism in the Indian subcontinent

Buddhism, which originated in India, gradually dwindled in that region starting in the 4th–6th century CE, and was largely ousted by Hinduism approximately by the 12th century, in a centuries-long process. Lack of appeal among the rural masses, who instead embraced religious rituals and beliefs developed during the Hindu synthesis, as well as Turkic invasions and dwindling financial support from trading communities and royal elites, were major factors in the decline of Buddhism in its Indian homeland.

Source: Wikipedia — Decline of Buddhism in the Indian subcontinent (CC BY-SA 4.0)