The Pentecostal movement began in 1901 in Topeka, Kansas under the leadership of Charles Parham. It spread from there to the famous Azusa Street Revival in Los Angeles in 1906 led by William Seymour. The movement emphasizes baptism by the Holy Spirit with the evidence of speaking in tongues. It rapidly grew worldwide in the early 20th century through missionary efforts and evangelists. Major Pentecostal denominations and independent churches now exist globally, emphasizing spiritual gifts and spreading the Pentecostal message.