Notes and diagram of the Legend of the True Cross by Piero della Francesca

Charcoal on off-white laid paper

Black ink on tan wove paper mounted on buff card

Watercolor over graphite on off-white wove paper; verso: graphite

Graphite on paper

Black ink on off-white wove paper

Watercolor and graphite on white wove paper

Oil over graphite on off-white wove paper

Charcoal on brown wove paper, fixed

Graphite on paper

Crayon over graphite on off-white wove paper

Black ink on off-white wove paper

Drawing scratched on slide film