Unfinished Study of Lioness and Cubs, from the North-West Door of the Duomo of Florence

Graphite on paper

Watercolor on off-white wove paper

Graphite and blur crayon on paper ; graphite on paper

Oil on cardboard

Black ink, graphite, and yellow chalk on off-white wove paper

Unmounted drawing: ink on paper

Graphite on paper

Graphite on ivory wove paper

Colored crayons on paper

Black pen on paper

Black crayon on paper

Graphite on paper