By hammer and fire (a martillo y fuego), Goldmaking techniques of the ancient Colombians © Trustees of the British Museum. Created by British Museum.

This art history video discussion examines "Justinian and His Attendants," 6th century, San Vitale, Ravenna.

Evan and Anne discuss a Byzantine depiction of a griffin, now at the Metropolitan Museum of Art (Acc. 2000.81). CC BY 4.0.

Evan Freeman, PhD and Anne McClanan, PhD discuss a Byzantine mosaic of a personification of Ktisis/Foundation, now at the Metropolitan Museum of Art (Acc. 1999.99). CC BY 4.0.

Harbaville Triptych, mid-10th century, Constantinople, ivory with traces of polychromy, 28.2 x 24.2 x 1.2 cm (Musée du Louvre) A conversation with Dr. Beth Harris and Dr. Steven Zucker. Created by Smarthistory.

Arnold Böcklin, Self-Portrait with Death Playing the Fiddle, 1872, oil on canvas, 75 x 61 cm (Alte Nationalgalerie, Berlin). Created by Beth Harris and Steven Zucker.

Julius Caesar installs Cleopatra as Pharaoh in Ptolemaic Egypt and becomes Dictator for Life, only to be assassinated by Brutus on the Ides of March.

Gustave Caillebotte, Man at his Bath, 1884, oil on canvas, 57 x 45 in. (144.8 x 114.3 cm), (Private Collection, on loan to the National Gallery, London) Speakers: Dr. Parme Giuntini, Director of Art History, Otis College of Art and Design Dr. Robert Summers, Lecturer, Otis College of Art and Design. Created by Beth Harris and Steven Zucker.

Gustave Caillebotte, The Floor Scrapers (Les raboteurs de parquet), 1875, oil on canvas, 102 x 146.5 cm (Musée d'Orsay, Paris). Speakers: Dr. Parme Giuntini, Director of Art History, Otis College of Art and Design and Dr. Robert Summers, lecturer, Otis College of Art and Design. Created by Beth Harris and Steven Zucker.

Met curator Marla Prather on motion in Alexander Calder’s Mobile, 1941. Alexander Calder was born to a family of sculptors. His grandfather, Alexander Milne Calder (1846-1923), studied with Thomas Eakins and is famous for the elaborate sculptural decorations of Philadelphia's City Hall. Calder himself had studied to be an engineer at the Stevens Institute of Technology before attending the Art Students League in New York. Like many aspiring artists of his generation, Calder then spent time in Paris where he was inspired by Joan Miró's work and absorbed the playfulness of Dada. Indeed, it was the French artist Marcel Duchamp who christened Calder's hanging sculptures "mobiles." For works such as this one, Calder cut sheet metal into various shapes and assembled these elements in a chain-linked system so that the flat metal pieces move in response to currents of air. This particular mobile was included in the 1942 exhibition "Artists for Victory" at the Metropolitan where the sculpture committee awarded it a prize and recommended it be added to the collection. Created by The Metropolitan Museum of Art.

Camel, first half of the 12th century, fresco transferred to canvas, from San Baudelio de Berlanga, Spain (Met Cloisters, New York) speakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker. Created by Smarthistory.

Now we'll add a lens to our camera and explore the idea of an f-stop.

This art history video discussion examines Robert Campin's (also called the Master of Flemalle) "Christ and the Virgin," c. 1430-35, oil and gold on panel, 11-1/4 x 17-15/16 inches / 28.6 x 45.6 cm (Philadelphia Museum of Art).

This art history video discussion examines Robert Campin's Merode Altarpiece, tempera and oil on panel, 1425-28 (Metropolitan Museum of Art).

Capital of a column from the audience hall of the palace of Darius I, Susa, c. 510 B.C.E., Achaemenid, Tell of the Apadana, Susa, Iran (Louvre). Speakers: Dr. Steven Zucker & Dr. Beth Harris. Created by Steven Zucker and Beth Harris.

4th-3rd century B.C.E. bronze, 69 cm (Capitoline Museums, Rome. Speakers; Dr. Steven Zucker and Dr. Beth Harris. Created by Beth Harris and Steven Zucker.

Capitoline Venus, 2nd century C.E., marble, 193 cm (Capitoline Museums, Rome) (Roman copy of the Aphrodite of Knidos, a 4th century B.C.E. Greek original by Praxiteles) Speakers: Dr. Beth Harris and Dr. Steven Zucker. More art history videos on smarthistory.org.

This art history video discussion examines Caravaggio's "Calling of St. Matthew," oil on canvas, c. 1599-1600 (Contarelli Chapel, San Luigi dei Francesi, Rome).

This art history video discussion examines Caravaggio's "Crucifixion of St. Peter", oil on canvas, 1601 (Santa Maria del Popolo, Rome).

This art history video discussion examines Caravaggio's "Death of the Virgin," 1605-06, Oil on canvas, 12 feet, 10 inches x 8 feet (369 x 245 cm) (Musee du Louvre, Paris). Painted for the altar of a family chapel in the church of Santa Maria della Scala del Trastevere, Rome.