""A Textbook of Church History V4: 1517-1648"" is a historical book written by John C. L. Gieseler and published in 1861. The book is the fourth volume in a series of textbooks on the history of the Christian church. This volume covers the period between 1517 and 1648, which includes the Reformation, the Counter-Reformation, and the Thirty Years' War. The book provides an in-depth analysis of the major events, figures, and movements that shaped the...