Why medieval Europeans marched through cities whipping themselves until their blood flowed freely

Why medieval Europeans marched through cities whipping themselves until their blood flowed freely
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In short: During the 14th century, thousands of Europeans joined public processions to scourge their own flesh in response to plague, war, and famine. These flagellants believed that physical suffering was a necessary path to salvation, but their radical displays of piety eventually triggered a fierce crackdown from the Catholic Church.

The practice of self-flagellation—derived from the Latin 'flagellare'—has deep roots in Christian history as a form of mortification. While early monks like the 11th-century Dominicus Loricatus used the discipline to share in the sufferings of Christ, the movement gained mass public appeal in 1259. Following an epidemic in Perugia, citizens began marching in large, rhythmic processions, whipping themselves to repent for sins. This phenomenon spread rapidly across Italy and Europe, often fueled by millenarian fears and the desire to avert divine wrath.

The movement reached its peak during the Black Death in 1349. Groups such as the Brothers of the Cross in Germany marched in 33.5-day campaigns, representing the years of Jesus's life. They held rituals twice daily, striking themselves with whips until they bled, sometimes collecting the blood as a holy relic. While initially tolerated, the movement's rapid growth and tendency to challenge ecclesiastical authority alarmed the Church. Pope Clement VI officially condemned them in 1349, and later, Gregory XI instructed inquisitors to eradicate them, associating the groups with heresy.

Despite official suppression, the practice persisted in various forms. In the 15th century, local princes took harsh action, burning hundreds of followers in Thuringia. Yet, the tradition of flagellation remained an accepted, albeit private, form of penance within the Catholic Church. Today, remnants of these practices survive in the annual processions of the Hermanos Penitentes in the American Southwest and during Holy Week in countries like the Philippines, where some continue to perform extreme acts of devotion.

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