The history of Vaishnavism stretches back to the beginning of time itself. Today we find that there are four main Vaishnava sampradayas (disciplic lines) still in existence, each tracing their roots to prominent personalities mentioned in the Vedas. The four successions are known as the Sri Lakshmi sampradaya, Rudra sampradaya, Kumara sampradaya, and the Brahma sampradaya. Srila Veda Vyasadev, the compiler of the Vedas, is an acarya in the Brahma sampradaya. In more recent times, from 1017 AD through 1137 AD, these sampradayas saw the emergence of four powerful preachers; Ramanuja Acharya, Nimbarka Acharya, Vishnu Swami, and Madhva Acharya, each lending their name to one of the sampradayas.