The Martyrs Mirror or The Bloody Theater, first published in 1660 in Dutch by Thieleman J. van Braght, documents the stories and testimonies of Christian martyrs, especially Anabaptists. The full title of the book is The Bloody Theater or Martyrs Mirror of the Defenseless Christians who baptized only upon confession of faith, and who suffered and died for the testimony of Jesus, their Saviour, from the time of Christ to the year A.D. 1660. The use of the word defenseless in this case refers to the Anabaptist belief in non-resistance. The book includes accounts of the martyrdom of the apostles and the stories of martyrs from previous centuries with beliefs similar to the Anabaptists.
In 1745, Jacob Gottschalk arranged with the Ephrata Cloister to have them translate the "Martyrs' Mirror" from Dutch into German and to print it. The work took 15 men three years to finish and in 1749, at 1512 pages, was the largest book printed in America before the Revolutionary War. An original volume is on display at the Ephrata Cloister.
- Schmidt, Kimberly D. (2001). "'Sacred Farming' or 'Working Out': The Negotiated Lives of Conservative Mennonite Farm Women". Frontiers: A Journal of Women Studies 22 (1): 79–102. http://muse.jhu.edu/journals/frontiers/v022/22.1schmidt.html.
- "News at the Ephrata Cloister: Committed to Print: Printing at the Ephrata Cloister". Ephrata Cloister. http://www.ephratacloister.org/news.htm. Retrieved 2010-11-28.
- "The Mirror of the Martyrs". Kauffman Museum. http://www.bethelks.edu/kauffman/martyrs/creation.html. Retrieved 2010-11-28.
- Full text of Martyrs Mirror
- The 104 illustrations from the Martyrs Mirror
- Martyrs Mirror from Global Anabaptist Mennonite Encyclopedia Online