“St. John the Baptist indicates Christ to the disciples”, by fourteenth-century Florentine goldsmiths. The Saint holds up the motto: “Ecce Agnus Dei, exception Qui tollit peccata mundi”.Tile of “The Silver Altar of St. John's Treasure” (1367 - 1483), Museum of the Opera del Duomo (Museum of Florence Cathedral of Santa Maria del Fiore), Florence.Detail.