 The third chapel on the left is the largest in the church, and is called the Cappellone di San Giacomo della Marca, and hosts the preserved body of St James of the Marches.It was commissioned by Gonzalo di Cordova, called the great captain.The ceilings are frescoed by Massimo Stanzione, and depict the "Miracles of the Saint", including the procession by Neapolitans with his body to compel the volcano Vesuvius to stop its 1631 eruption.