My current work is about the Anabaptist Siege of Munster in the 16th Century.
The Anabaptists (a persecuted Lutheran sect) took over the city of Munster in 1534, under the leadership of 2 prophets, Jan Matthias and Jan Van Leiden, with the aid of local town leaders. These prophets expelled and murdered Lutherans, Catholics and dissenters. They predicted the end of world, claimed to communicate with God and introduced edicts under the guise of divine instruction to their faithful. These included iconoclasm, a strict rule of law, forced marriage and polygamy.
Munster was then besieged by its expelled bishop. After a long resistance, considerable deaths and suffering the city was taken by the besiegers. Jan Van Leiden and several other prominent Anabaptists were captured, imprisoned, and finally tortured and executed in the marketplace of Munster.