Church of the Cistercian Abbey Altenberg, Odenthal

Brown ink and brown wash on wood; verso: red chalk

Brown ink and gray wash over traces of black chalk on cream antique laid paper, framing line in brown ink

Brown ink and gray wash over black chalk, incised, on cream antique laid paper, mounted on an album leaf; verso: outlines of recto are traced through in black chalk, incised

Brown ink, brown wash and white opaque watercolor on brown prepared paper, framing line in brown ink

Brown ink over black chalk and incidental pink wash, on light tan antique laid paper, laid down, framing lines in brown ink and dark brown ink

Brown ink on cream antique laid paper

Transparent watercolor, brown ink, and pink and white opaque watercolor on gray prepared paper; verso: brown ink

Brown ink on off-white antique laid paper, framing line in black ink

Brown ink over graphite on light tan antique laid paper, framing line in brown ink

Brown ink on light tan antique laid paper; verso: two tones of brown ink

Brown ink on parchment

Brown ink, brown wash, and white opaque watercolor over black chalk on light tan antique laid paper