In 1376, Pietro Gambacorta, signore of Pisa (1370-92), commissions a cycle dedicated to the life of San Ranieri, Pisa’s most important local saint. The paintings are located on the right of the main entrance. Left unfinished at the death of Andrea da Firenze, the painter chosen by Gambacorta in 1379, the second part of the cycle is executed by Antonio Veneziano in 1384-86.