Pope Innocent VIII issued Summis desiderantes affectibus, a papal bull that backed inquisitors working in German lands and treated witchcraft as a serious religious crime. It helped legitimize harsher investigations in parts of the Holy Roman Empire and encouraged officials to view witchcraft as tied to heresy.
Heinrich Kramer’s Malleus Maleficarum (“Hammer of Witches”) was published and presented itself as a guide for identifying and prosecuting witches. It helped spread a more uniform, demon-focused view of witchcraft and influenced later interrogations and courtroom practices, even though it was not law.
Ulrich Molitor published De lamiis et pythonicis mulieribus (“On Witches and Female Soothsayers”). The work became widely reprinted and helped shape popular images of witches through woodcut illustrations, while also reflecting debates about how much alleged witch activity was real versus illusion.
Emperor Charles V’s Constitutio Criminalis Carolina (often called the “Carolina”) became a key criminal code across much of the Holy Roman Empire. It tried to set rules for evidence and procedure, but it also allowed torture under certain conditions, shaping how confessions were produced in many witch trials.
In the imperial city of Rottweil (in Swabia), a series of witch trials began that would continue for more than a century. The repeated episodes show how persecution could persist locally over time, driven by community accusations and authorities’ willingness to prosecute.
Witch prosecutions began in the Diocese of Trier and soon escalated into one of the Holy Roman Empire’s most notorious mass persecutions. The trials spread from rural communities toward the city, with accusations multiplying as suspects were pressured to name others.
The Trier trials intensified when prosecutions reached the city itself. Large numbers of executions followed, and the campaign became an example of how legal machinery, religious tensions, and fear could reinforce each other once a hunt gained momentum.
By the early 1590s, the main wave of Trier prosecutions tapered off. While the exact totals are debated, historians treat the Trier episode as a turning point that demonstrated the extreme scale possible in a prince-bishopric when authorities pursued witchcraft as a major threat.
In the Prince-Abbey of Fulda, Prince-Abbot Balthasar von Dernbach launched a major witch-hunt as part of a stricter Counter-Reformation program. A special commissioner (Balthasar Nuss) oversaw interrogations, and executions rose quickly once torture-driven confessions started producing new accusations.
The main Fulda witch-hunt ended soon after Prince-Abbot Dernbach died. This shows a recurring pattern in the Holy Roman Empire: local rulers and their courts often drove witch trials, and a change in leadership could abruptly slow or stop prosecutions.
In the Prince-Bishopric of Würzburg, a major wave of trials developed during the Thirty Years’ War era and produced large numbers of executions. Records are incomplete, but scholars identify Würzburg as one of the largest German persecutions, with victims from many social levels, including children.
In the Prince-Bishopric of Bamberg, Prince-Bishop Johann Georg Fuchs von Dornheim oversaw a powerful new campaign of witch prosecutions. The trials used a dedicated commission and heavy interrogation tactics, and they targeted not only the poor but also city leaders and officials.
Bamberg authorities built the Drudenhaus, a special prison designed for holding and interrogating people accused of witchcraft. Creating dedicated detention space made it easier to process large numbers of suspects and helped turn the hunt into an organized system rather than isolated trials.
Jesuit priest Friedrich Spee published Cautio Criminalis anonymously, arguing that torture and flawed procedures produced false confessions and endless chains of accusations. The book became a major early critique of witch trials from within Catholic Europe and helped weaken the legitimacy of mass prosecutions.
In early 1632, the war reached Bamberg directly: Swedish forces entered the prince-bishopric, and Prince-Bishop Dornheim fled. The Drudenhaus was closed as the situation collapsed, showing how political and military shocks could interrupt even the largest witch-hunt systems.
By the 1630s, major hunts like Würzburg and Bamberg had ended, and the most intense phase of persecution in the German lands was largely over. Later trials continued in some territories, but the combination of legal criticism, war disruption, and growing skepticism reduced the chances of empire-wide mass panics on the same scale.
Witch Trials in the Holy Roman Empire (15th–17th centuries)