With the passage of time, there arose certain developments within the Buddhist Order that finally led ti the formation of different sects. The Mahasanghika came into existence toward the end of the first century after the Buddha's death. The other major school, which claimed to be orthodox and conservative, became known as Theravada. The school of Mahasinghika was later called Mahayana. It was the later that was in due course introduce in to Tibet, acquiring its own distinct flavor and characteristics as the Vajirayana School.