Pietro Lorenzetti, Birth of the Virgin, from the
altar of Saint Savinus, Siena Cathedral, Siena, Italy, 1342.
Tempera on wood, 6′ 1″× 5′11″. Museo dell’Opera del
Duomo, Siena.
In this triptych, Pietro Lorenzetti revived the pictorial illusion -
ism of ancient Roman murals and painted the architectural
members dividing the panel as if they extended back into the
painted space.