Three paintings, in tempera on a gold background, depicting the Evangelists John, Matthew and Mark, works of 1398 by Lorenzo di Bicci. They formerly held back the curtains of the wooden canopies over the altars dedicated to the Conception, which once stood along the counter-façade of the Cathedral before their removal in the 19th century. The composition was completed by a Saint Luke, gone in the meantime lost together with the Agnus Dei painted by Giuliano d'Arrigo - called the Pesello - that was positioned in the center. At the altar there was a lost painting by Mariotto di Nardo and the detached fresco of the so called "Maddona of the clerics", today on a different altar in the Cathedral. In occasion of the demolition of the altar, the paintings were preserved in the Sacristy of the Canons and later exhibited in the Museum.