Details, Triangular Sections of Ceiling, Piccolimini Library, Duomo, Siena

Watercolor over graphite on off-white wove paper

Crayon on paper

Graphite on off-white wove paper

Ink and brown pencil on white wove paper

Watercolor on off-white wove paper

Watercolor over graphite on heavy off-white wove paper

Black ink, graphite, and colored chalk on translucent buff wove paper

Charcoal on beige laid paper

Graphite on white wove translucent paper

Black ink and yellow chalk on off-white wove paper

Colored crayons on paper

Graphite on buff wove paper; attached sheet: graphite on tracing paper