Vaishali holds immense importance in Buddhist history. It was here that the Second Buddhist Council was held, a significant event that led to the early schisms within the Buddhist community. Stupa I is believed to have been built to house one-eighth of the Buddha's ashes after his cremation. Stupa II is significant as it marks the location where Buddha delivered his last sermon and announced his approaching death. The stupas have undergone several phases of construction and renovation over centuries. Archaeological excavations have revealed layers of history, showcasing the evolution of Buddhist architecture and the importance of Vaishali as a major Buddhist center.