Herman J. Selderhuis is professor of church history and church polity at the Theological University Apeldoorn (Netherlands) and director of Refo500, the international platform for knowledge, expertise and ideas related to the sixteenth-century Reformation. He is a leading Reformation historian and author of several books, including John Calvin: A Pilgrim's Life and Calvin's Theology of the Psalms. He also serves as the academic curator of the John a Lasco Library (Emden, Germany) and as president of the International Calvin Congress.