Stairs in the nave lead down to the crypt and St. Francis's tomb, rediscovered only in 1818, centuries after it had been concealed from Perugian plunderers.
St. Francis's tomb was found for the first time in 1900.
mnli hypothesis: St. Francis's tomb was found for the first time in 1900. premise: Stairs in the nave lead down to the crypt and St. Francis's tomb, rediscovered only in 1818, centuries after it had been concealed from Perugian plunderers.