A painting can be out of copyright and thephotograph of it can still be protected.

Three Standing Figures (recto); Seated Woman and a Male Hermit in Half-length (verso)

Stefano da Verona (Stefano di Giovanni d'Arbosio di Francia) (d. 1438)

1435–38 · Pen and brown ink, over traces of charcoal or black chalk (recto); pen and brown ink, brush with touches of brown wash, over traces of charcoal or black chalk (verso)

Studies for the Libyan Sibyl (recto); Studies for the Libyan Sibyl and a small Sketch for a Seated Figure (verso)

Michelangelo Buonarroti (d. 1564)

ca. 1510–11 · Red chalk, with small accents of white chalk on the left shoulder of the figure in the main study (recto); soft black chalk, or less probably charcoal (verso)

Study of a Figure in a Niche (Saint Ambrose; recto); Architectural Studies: Four Alternative Designs for Fictive Niches and an Unrelated Design with Garlands (verso), ca. 1560-67

Giuseppe Arcimboldo (d. 1593)

1564–65 · Pen and brown ink, brush with pale brown and purple wash, over soft black chalk (recto); pen and brown ink, some sketches over black chalk (verso)

Triton

Giambologna (d. 1608)

1590s · Bronze

Saint Anthony of Padua Healing a Sick Man (recto); Partial Figural Studies Based on the Composition on the Recto (verso)

Tiberio Titi (d. 1622)

1590–1600 · Pen and light brown ink, over black chalk; some reworking of contours in black chalk(?) (recto); black chalk (verso)

Seated Nude Young Man in Nearly Frontal View

Guercino (Giovanni Francesco Barbieri) (d. 1666)

ca. 1618 · Modified black chalk (dipped in a gum solution), traces of white gouache highlights, on light brown paper

Study for a Triton (recto); Anatomical Studies ? (verso)

Gian Lorenzo Bernini (d. 1680)

1642–43 · Red chalk, the background tinted with an almost imperceptible pale brown wash, framing lines in pen and brown ink (recto); black chalk (verso)

Study for Angels Sealing the Foreheads of the Children of Israel in Saint Peter's Basilica

Pietro da Cortona (Pietro Berrettini) (d. 1669)

1652 · Black chalk, brush with brown and gray wash, highlighted with white gouache, on three sheets of brownish paper glued with overlapping joints

Historical subject with men and a boy near a ship (recto). Anatomical study of a foot (verso)

William Hamilton (d. 1801)

1770–80 · Recto: pen and black ink, brush and brown wash and watercolor, over graphite Verso: pen and black ink, brush and wash, over graphite

Male with a staff in a storm (recto). Anatomical studies of a foot (verso)

William Hamilton (d. 1801)

1770–80 · Recto: pen and black ink, brush and gray wash, over graphite Verso: pen and brown ink

Studies for Hercules Holding a Club Seen in Frontal View, Male Nude Unsheathing a Sword, and the Movements of Water (recto); Study for Hercules Holding a Club Seen in Rear View (verso)

Leonardo da Vinci (d. 1519)

ca. 1506–8 · Pen and brown ink; soft black chalk or charcoal (recto); soft black chalk or charcoal (verso)

Study for "The Block" [angel] (recto); Study for "The Block" [people] (verso)

Romare Bearden (d. 1988)

ca. 1971 · a and b: Green marker on paper