Vaulting of the Baptistery
by MASOLINO da Panicale, Fresco
The images of the four evangelists with their respective symbols in the radiating compartments of the vaulting complement the iconographic program of the fresco cycle. In conformity with the iconographic tradition linking John the Evangelist and John the Baptist, John the Evangelist is given the compartment that opens downward the altar space. On the capstone of the vault the Lamb of God is painted.