General View and Details, Sala Delle Stampe, Borgia Apartments, Vatican

Black ink on white wove paper

Graphite on white wove paper

Red, brown, black and white conté crayon on gray wove paper

Graphite, graphite wash , and staples on layered translucent vellum paper

Black ink on cream wove paper

Colored chalk on brown wove paper

Charcoal on off-white laid paper

Watercolor on off-white wove paper

Watercolor and graphite on white wove paper

Graphite on paper

Graphite, white gouache and gray wash on buff wove paper

Graphite on off-white wove paper