Anonymous Artist, Portrait of a Young Man, c. 1650, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/89

Anonymous Artist, Andrea de' Franceschi, late 16th or early 17th century, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/42

Anonymous Artist, The Smiling Girl, c. 1925, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/62

Anonymous Artist, Pope Innocent X, c. 1650, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/87

Anonymous Artist, Madonna and Child, c. 1470, tempera on poplar panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/1189

Anonymous Artist, The Lacemaker, c. 1925, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/61

Anonymous Artist, Miss Nelly O'Brien, early to mid nineteenth century, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/1215

Anonymous Artist, Saint Jerome in the Wilderness, c. 1475, tempera on poplar panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/39

Anonymous Artist, Saint Jerome in the Wilderness, c. 1490/1500, tempera on poplar panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/423

Continental Painter, Portrait of a Woman, 1625, Oil on metal laid on card, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/435925

Continental Painter, Portrait of a Woman, 1625, Oil on copper, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/435926

Anonymous Artist, Christ Appearing to the Virgin, c. 1475, oil on panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/52

Continental Painter, Portrait of a Man, 1545, Oil on card, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/435924

Unknown 19th Century, Portrait of a Lady, probably c. 1820, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/1131

Anonymous Artist, Saint Bernard with Donor [obverse], probably early 20th century, oil on panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/3200

Unknown 18th Century, Benjamin West, c. 1776, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/1133

Anonymous Artist, Moonlight, early 20th century, oil on canvas, National Gallery of Art, Washington. https://dartabase.art/cite/nga/3204

Anonymous Artist, Venus and Cupid in a Landscape, c. 1505/1515, oil on panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/283

Anonymous Artist, Study of an Old Man, probably late 17th century, oil on panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/1202