Monkeys: Mother and Two Children

Mori Sosen 森狙仙

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

Jusepe de Ribera

The Student

Jozef Israëls

The Denunciation of Adam and Eve

George Frederic Watts M. Grieve Co.

The Creation of Eve

George Frederic Watts M. Grieve Co.

Calabazas, after Velazquez

Denman Waldo Ross Diego Rodriguez Velázquez

X-radiograph(s) of "Putto holding a Book (detail after a painting from Domenico Zampieri in Palazzo Pallavicini-Rospigliosi, Rome)"

Domenico Zampieri, called Domenichino

Cadaver

Jerry Liebling

Landscape with Pond

William Langson Lathrop

Portrait of a Young Woman

Robert Hatton Monks

At the Milliner's

Pierre-Auguste Renoir

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

Paolo Caliari, called Veronese

Portrait of a Man

Antonio Mancini

Photo by Kip Ruhl

Larry Stark

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

Gordon W. Gahan

Old Man in Oriental Costume

Giovanni Domenico Tiepolo

Head of a Man

Ferdinand Landerer Martin Johann Schmidt (called Kremser-Schmidt)

X-radiograph(s) of "Sheperdess"

Paulus Moreelse

Fountain Head, Philadelphia

George Krause

Elizabeth Cotten

Brian Lanker

Henry Pickering Bowditch (1840-1911)

Sarah Gooll Putnam Henry Pickering Bowditch

X-radiograph(s) of "Young Man"

Peter Paul Rubens

Untitled (Borobudur, Java)

Ben Shahn

Horses

Berthe Martinie

[Pottery planter, New England]

Lyonel Feininger

[Organ grinder's monkey]

Lyonel Feininger

"Slim"

David Gordon

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

Anthony van Dyck Peter Paul Rubens

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

Mather Brown

Portrait of an Old Man

Rembrandt Harmensz. van Rijn

X-radiograph(s) of "Cotton Mather"

Peter Pelham

Ushabti

Head of an Apostle

Benedetto Luti

Albert Einstein (1879-1955), Princeton, New Jersey

Ernst Haas

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

Profile Portrait of a Boy with a Horse

Denman Waldo Ross

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

Samuel Taylor Coleridge (1772-1834)

Washington Allston

Anarchism: Holland. Portraits of Salomonson: Anarchism: Salomonson - a Dutch apostle of the return to nature.: Monsieur Joseph Salomonson d'Amsterdam. Ex-consul Meva, l'apôtre de la vie naturelle

Unidentified Artist

X-radiograph(s) of "Girl with a Falcon"

Willem van der Vliet

Beata Beatrix

Dante Gabriel Rossetti

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

Jan Anthonisz. van Ravesteyn

[Wagon wheel]

Lyonel Feininger

Young Girl with Butterflies

Matthijs Maris

X-radiograph(s) of "Adoration of Magi"

Gentile Bellini

Portrait of David

Denman Waldo Ross

X-radiograph(s) of "Old Woman"

Jacobus Levecq

Reclining Female Nude

Thomas Cowperthwait Eakins

Portrait of a Young Man

Altobello Melone Jacopo Palma (called il Vecchio)

Half-Length Portrait of a Young Man, Head Down

Denman Waldo Ross

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

Jacob Adriaensz. Backer Rembrandt Harmensz. van Rijn

Rock of Ages

Johannes Adam Simon Oertel

Rev. Martin Luther King (Nine Drawings Portfolio)

Ben Shahn

Center panel of Triptych

James Brooks

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

Antonio del Massaro da Viterbo, called Pastura

X-radiograph(s) of "Jacob van Dael"

Michiel Jansz. van Miereveld

X-radiograph(s) of "St.Peter and Donor"

Bartholomaeus Bruyn the Elder

Untitled (three-quarter portrait of a soldier (smiling), Vietnam)

Gordon W. Gahan

Paul Helleu (1859-1927)

John Singer Sargent

Untitled (young woman in black top)

Gordon W. Gahan

X-radiograph(s) of "Pieta"

Master of the Fogg Pietà

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

Colijn de Coter Rogier van der Weyden

X-radiograph(s) of "Madonna of the Well (Copy from Raphael)"

Franciabigio

X-radiograph(s) of "Isiah Thomas"

Ethan Allen Greenwood

Reclining Figure

Mario Sironi

Resurrection of Christ, after studies by Michelangelo

Marcello Venusti

Untitled (man with wrinkled brow, wearing hat)

Gordon W. Gahan

Dinglinger

Georg Friedrich Schmidt Antoine Pesne

X-radiograph(s) of "Charles Paxton"

John Cornish

Christ and the Penitent Sinners

Unidentified Artist Peter Paul Rubens

Ernestine Anderson

Brian Lanker

Aja Ennis, Boston Medical Center

Nicholas Nixon

Untitled (hand holding small, furry, rodent-like animal (titi monkey?))

Gordon W. Gahan

"And the devil that deceived them was cast into the lake of fire, where the beast and the false prophets are..."

Odilon Redon

Cupid Testing His Arrow

Pierre-Paul Prud'hon

I Was Not Waving But Drowning II

Atul Bhalla

Marian Anderson

Brian Lanker

Untitled (worker throwing coal into furnace, Nigeria)

Ken Heyman

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

Diego Rodriguez Velázquez

[Lux and Laurence Feininger, Weimar]

Lyonel Feininger

Scapin

Honoré-Victorin Daumier