The Reading and Preaching of the Scriptures in the Worship of the Christian Church is a multivolume study by Hughes Oliphant Old that explores the history of preaching from the words of Moses at Mount Sinai through modern times. In Volume 4, The Age of the Reformation, Old focuses on changes in preaching due to the Protestant Reformation and the Catholic Counter-Reformation. This is the pivotal volume in Old's project, covering as it does not only what the Reformers and Counter-Reformers preached but also their reform of preaching itself. Old traces the main events and people involved in the development of preaching at this time - Luther, Calvin, Thomas of Villanova, Francis Xavier, William Perkins, John Donne, Johann Gerhard, Jacques Bossuet, and many more - while also giving due attention to how preaching was itself an act of worship.