A medal for a massacre. A Te Deum for thousands of deaths. A celebration that still shocks centuries later.

On this day in history—11 September 1572—Pope Gregory XIII ordered Rome to give thanks for not one, but two "victories": the Catholic triumph over the Ottomans at Lepanto and the mass slaughter of French Protestants during the St Bartholomew’s Day Massacre.

In this episode:

• The shocking papal reaction to the St Bartholomew’s Day Massacre
• The political and religious tensions behind Gregory’s “thanksgiving”
• Why he linked the massacre with the naval victory at Lepanto
• The commemorative medal and what it tells us about 16th-century propaganda
• Gregory XIII’s surprising legacy—from calendar reform to Jesuit patronage

To some, it was divine ...