The Azusa Street Revival was a historic Christian revival that began in Los Angeles, California, in 1906, led by William J. Seymour. It became a major center of the early Pentecostal movement, emphasizing the baptism of the Holy Spirit, speaking in tongues, healing, prayer, and passionate worship. People from many racial and denominational backgrounds gathered there, and its influence spread Pentecostal Christianity throughout the United States and around the world.