Concordia Publishing House (CPH), founded in 1869, is the official publishing arm of the Lutheran Church–Missouri Synod (LCMS). Headquartered in St Louis, Missouri, at 3558 S. Jefferson Avenue, CPH publishes the synod's official monthly magazine, The Lutheran Witness, and the synod's hymnals, including The Lutheran Hymnal (1941), Lutheran Worship (1982), and Lutheran Service Book (2006). It publishes a wide range of resources for churches, schools, and homes and is the publisher of the world's most widely circulated daily devotional resource, Portals of Prayer. Its children's books, known as Arch Books, have been published in millions of copies. Concordia Publishing House is the oldest publishing company west of the Mississippi River and the world's largest distinctly Lutheran publishing h