If by chapel you mean a religious meeting place designated as a “chapel,” then the Gadfield Elm chapel in Worcestershire, England, is the oldest Mormon chapel in the world. Built in 1836 by the United Brethren, the chapel became a Mormon centre in 1840 during Wilford Woodruff’s British mission. Local Mormons — whose restoration of the building and sacred myth-making centred thereon are interesting manifestations of Mormon localism — celebrated the 175th anniversary of the 1840 conference that established the Mormon church in their area.