The Seventh-day Adventist Church had its roots in the Millerite movement of the 1830s and 1840s, during the period of the Second Great Awakening, and was officially founded in 1863. Prominent figures in the early church include Hiram Edson, James Springer White and his wife Ellen G. White, Joseph Bates, and J. N. Andrews. Over the ensuing decades the church expanded from its original base in New England to become an international organization. Significant developments in the 20th century led to its recognition as a Christian denomination.