BOLONESE SCHOOL Second half of the 17th century, Surrounding Elisabetta Sirani (Bologna 1638 1665): Study of a young boy's head. Black stone and red chalk on beige paper (On the reverse: strips of reinforcing paper on the upper left; small accidents on the left side; small stains). On the reverse: Study of a torso with hands crossed and folded. Black stone. Annotated lower right in black stone Sirani. H. 25,4 W. 20,2 cm