Никколо Пизано
Early on the church began receiving many works of art from the faithful. This has grown into the present-day vast collection of exceptional art treasures created by some the greatest Italian artists, including Giunta Pisano, Nicola Pisano, Arnolfo di Cambio, Niccolò dell'Arca, Michelangelo, Iacopo da Bologna, Guido Reni, Guercino and Filippino Lippi.