High Quality Content by WIKIPEDIA articles! The International Pentecostal Holiness Church (IPHC) or simply Pentecostal Holiness Church (PHC) is a Pentecostal Christian denomination founded in 1911 with the merger of two older denominations. Traditionally centered in the Southeastern United States, particularly the Carolinas and Georgia, the Pentecostal Holiness Church now has an international presence. In 2000, the church reported a worldwide membership of over one million—over three million including affiliates.