Design for a Candelabra1800 · Pen and ink, brush and wash on paperCooper Hewitt, Smithsonian Design Museum
Design for a Fountain in a Park1790 · Black chalk, brush and watercolor on paper, mounted29.8 × 48.3 cm (11 3/4 in. × 19 in.)Cooper Hewitt, Smithsonian Design Museum
Doorway, Loggia, Ground Floor, Villa Albani, Rome, Italy1780 · architecture, drawing — graphite, pen and sepia ink, brush and gray watercolor on brown-gray paper33.7 x 25.2 cm (13 1/4 x 9 15/16 in.)Cooper Hewitt, Smithsonian Design Museum
Landscape with a Burning Tower1780 · Pen and ink, brush and lustre on paper27.6 x 20 cm (10 7/8 x 7 7/8 in.)Cooper Hewitt, Smithsonian Design Museum
Design for a Doorway to the Sacristy of St. Peter's, Rome1778 · Pen and brown ink, brush and brown, gray wash, graphite on cream laid paperMat: 45.7 x 35.6 cm (18 x 14 in.)Cooper Hewitt, Smithsonian Design Museum
Two sketches for cartouches1775 · Pen and sepia ink on laid paper24.6 x 17.7 cm (9 11/16 x 6 15/16 in.)Cooper Hewitt, Smithsonian Design Museum
Three sketches1775 · Pen and ink on laid paper19.2 x 18.8 cm (7 9/16 x 7 3/8 in.)Cooper Hewitt, Smithsonian Design Museum