A major Church council in 1215 that passed a rule (Canon 21) requiring every Catholic to confess their sins out loud to a priest at least once a year.
The engine treats this rule as the start of a giant information-gathering network dressed up as a religious duty.
Because everyone from poor farmers to kings had to privately tell a local priest their secrets every year, the Church effectively built a map of what people across Europe were thinking and doing.
It shows how a spiritual practice can double as a mass surveillance and psychological-mapping system, an early blueprint for tracking a whole population.