The loggia at the tower's base is a chapel (Cappella di Piazza) marking the city's deliverance from the plague of 1348.
The Cappella di Piazza was built to remember those lost in the plague.
mnli hypothesis: The Cappella di Piazza was built to remember those lost in the plague. premise: The loggia at the tower's base is a chapel (Cappella di Piazza) marking the city's deliverance from the plague of 1348.