 The work depicts a popular legend of an 11th-century Florentine nobleman, and was a typical subject for late Trecento period and early Quattrocento artists.Here San Giovanni Gualberto and his enemy are in the church of San Miniato al Monte, which is outside of Florence.According to the legend, Giovanni Gualberto set out to kill the knight who had killed his brother, but when Giovanni confronted the knight, it was Good Friday and the knight was unarmed.