Detail of Verification of the True Cross, after Piero della Francesca

Charcoal on off-white laid paper

Brown chalk on off-white wove paper

Watercolor on off-white laid paper

Transparent and opaque watercolor and ink on white wove paper wrapped around cardboard

Graphite on off-white wove paper

Graphite on off-white wove paper

Watercolor and graphite on cream wove paper

Graphite on cream wove paper

Graphite on off-white wove paper

Graphite on off-white wove paper

Watercolor and white gouache over graphite on darkened cream wove paper

Pastel on brown wove paper