Here are some of his most notable works:
* "Luther und die deutsche Geschichte" (Luther and German History): A major study on the impact of Martin Luther on German history.
* "Martin Luther: Eine Biographie" (Martin Luther: A Biography): A comprehensive biography of Luther.
* "Die Reformation" (The Reformation): A book that explores the Reformation in its wider European context.
* "Glaube und Gewalt im Zeitalter der Reformation" (Faith and Violence in the Age of Reformation): A study on the relationship between religion and violence during the Reformation.
* "Die Geschichte der deutschen Reformation" (The History of the German Reformation): A comprehensive history of the Reformation in Germany.
Sachsse also edited numerous volumes and wrote articles on a wide range of topics related to the Reformation, early modern history, and intellectual history. He was a prolific scholar who made significant contributions to our understanding of this critical period in European history.