Columbia subject headings:
Daddi, Bernardo, active 1327-1348.
Lorenzetti, Pietro, active 1320-1348.
Painters--Italy--Siena.
Harvard subject headings:
Daddi, Bernardo, active 1327-1348.
Daddi, Bernardo, active 1350.
Lorenzetti, Pietro, -approximately 1348.
Painters--Italy--Italy--Siena.
Painters--Italy--Siena--Italy.
Princeton subject headings:
Daddi, Bernardo, active 1327-1348.
Lorenzetti, Pietro, active 1320-1348.
Painters--Italy--Siena--Italy.