Head of a Man

Wilhelm Leibl

Untitled (mother chimp with baby chimp)

Jack Gould

The Denunciation of Adam and Eve

George Frederic Watts M. Grieve Co.

X-radiograph(s) of "Three Girls"

Narcisse Virgile Diaz de la Peña

The Creation of Eve

George Frederic Watts M. Grieve Co.

X-radiograph(s) of "Abraham Grapheus"

Cornelis Vos

Untitled (woman in fur stole, animal head draped down her arm)

Curtis Studio

Henry James (1811-1882)

Frank Duveneck Henry James

Portrait of Seated Young Man with Mirror to Right

Denman Waldo Ross

Saint Paul

Claude Vignon

Landscape with Pond

William Langson Lathrop

At the Milliner's

Pierre-Auguste Renoir

X-radiograph(s) of "Portrait of a Dutch Lady"

X-radiograph(s) of "Allegory of Vice and Vertue (copy)"

Paolo Caliari, called Veronese

Photo by Kip Ruhl

Larry Stark

Untitled (soldiers in jungle during fighting in central highlands near Dak To, Vietnam)

Gordon W. Gahan

Head of a Man

Ferdinand Landerer Martin Johann Schmidt (called Kremser-Schmidt)

X-radiograph(s) of "Mrs. Benjamin Carpenter"

John Durand

Fountain Head, Philadelphia

George Krause

X-radiograph(s) of "Young Man"

Peter Paul Rubens

Untitled (Borobudur, Java)

Ben Shahn

Portrait of a Man with a Hat

Reginald Marsh

[Pottery planter, New England]

Lyonel Feininger

[Organ grinder's monkey]

Lyonel Feininger

"Slim"

David Gordon

X-radiograph(s) of "Self-Portrait"

Mather Brown

Portrait of an Old Man

Rembrandt Harmensz. van Rijn

Old English Lady

Bertha Tarnay

Ushabti

Head of an Apostle

Benedetto Luti

Male Profile Head

Denman Waldo Ross

Lion

Wenceslaus Hollar Albrecht Dürer

Untitled (soldiers in jungle during fighting in central highlands near Dak To, Vietnam)

Gordon W. Gahan

Pepper

Frank Noelker

Beata Beatrix

Dante Gabriel Rossetti

Head of a Bishop Saint

Unidentified Artist

X-radiograph(s) of "Portrait of a Woman"

Jan Anthonisz. van Ravesteyn

X-radiograph(s) of "Madonna and Child"

Nicolò Rondinelli

Young Girl with Butterflies

Matthijs Maris

Reclining Female Nude

Thomas Cowperthwait Eakins

Portrait of a Young Man

Altobello Melone Jacopo Palma (called il Vecchio)

Untitled (female lion in cage)

Joseph Janney Steinmetz

X-radiograph(s) of "Jan Hermanz Krul"

Jacob Adriaensz. Backer Rembrandt Harmensz. van Rijn

Head of Christ

Rembrandt Harmensz. van Rijn Rembrandt Harmensz. van Rijn

Death at Saint Martin

Lucien Clergue

Center panel of Triptych

James Brooks

X-radiograph(s) of "Adoration of the Child"

Antonio del Massaro da Viterbo, called Pastura

Paul Helleu (1859-1927)

John Singer Sargent

X-radiograph(s) of "Isiah Thomas"

Ethan Allen Greenwood

Reclining Figure

Mario Sironi

Resurrection of Christ, after studies by Michelangelo

Marcello Venusti

X-radiograph(s) of "Creation of Eve"

George Frederic Watts

Untitled (man with wrinkled brow, wearing hat)

Gordon W. Gahan

The Flying Dutchman (Act III): The Rapture of Senta and the Dutchman

Ignace-Henri-Jean-Théodore Fantin-Latour

X-radiograph(s) of "Jan de Montfort"

Anthony van Dyck

Christ and the Penitent Sinners

Unidentified Artist Peter Paul Rubens

Ernestine Anderson

Brian Lanker

X-radiograph(s) of "Portrait of a Lady"

Antonis Mor

X-radiograph(s) of "St. Yves"

Jacques Jordaens

Marian Anderson

Brian Lanker

Untitled (worker throwing coal into furnace, Nigeria)

Ken Heyman

Michel-François Le Tellier, Marquis de Louvois

Antoine Masson

X-radiograph(s) of "Alonzo Cano (copy)"

Diego Rodriguez Velázquez

Untitled (mother chimp holding baby chimp)

Jack Gould

Untitled (mother chimp holding baby chimp)

Jack Gould

X-radiograph(s) of "Pieta (copy)"

Anthony van Dyck

X-radiograph(s) of "Self-Portrait"

Jean-Auguste-Dominique Ingres

X-radiograph(s) of "Rhoda Cranston"

John Singleton Copley

Scapin

Honoré-Victorin Daumier

X-radiograph(s) of "Self-Portrait for Gauguin"

Vincent van Gogh