Pilgrim Holiness Church or ' International Apostolic Holiness Church '[IAHC] is a religious denomination associated with the holiness movement that split from the Methodist Episcopal Church by Martin Wells Knapp in 1897. It was first organized in Cincinnati, Ohio as the International Holiness Union and Prayer League [IHU/IAHC]. Knapp, founder of the IAHC, ordained and his Worldwide Missions Board sent Charles and Lettie Cowman who had attended God's Bible School to Japan in December 1900. By the International Apostolic Holiness Churches Foreign Missionary Board and the co-board of the Revivalist the Cowmans had been appointed the General Superintendents and the Kilbournes the vice-General Superintendent for Korea, Japan and China December 29, 1905. The organization later became the Pilgrim