A Diegueño of Santa Ysabel

Edward Sheriff Curtis

Aaron Siskind (1903-1991)

Gabrielle Keller Aaron Siskind

X-radiograph(s) of "Katharine van Cortlandt"

Pieter Vanderlyn

Philip A. Straus (1915 - 2004)

Philip A. Straus, Jr. Philip A. Straus, Sr.

X-radiograph(s) of "Lady in Prayer"

Leandro Bassano

Josef Albers

Hannes Beckmann

Untitled (closeup portrait of a man's face)

Bruce Davidson

Wassily Kandinsky, Dessau

Josef Albers

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

Jusepe de Ribera

A Diegueño of Capitan Grande

Edward Sheriff Curtis

X-radiograph(s) of "Mrs. Thomas Flucker (formerly called Judith Bowdoin)"

Joseph Blackburn

Untitled (man using his hands to stretch his face)

Joseph Janney Steinmetz

Theodore Roosevelt (1858-1919)

James Earle Fraser

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

Vincent van Gogh

David L. Evans (b. 1939)

Stephen E. Coit David L. Evans

Gloucester 1H

Aaron Siskind

Georges Clemenceau (1841-1929)

Jo Davidson

Homer, after antiquity

Pichler family

X-radiograph(s) of "Georges Curwin"

X-radiograph(s) of "Thomas Prince"

John Greenwood

Pierre Jeannin (1540-1622)

Georges Liard Sr. Guillaume Dupré

Hannes Meyer

Unidentified Artist

X-radiograph(s) of "Male Portrait"

Jan de Bray

X-radiograph(s) of "Mrs. Thomas Cranston"

John Singleton Copley

X-radiograph(s) of "Blood of the Redeemer "

Giovanni Bellini

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

Jacopo Tintoretto

Our Friend / National Citizens Political Action Committee

Ben Shahn

Portrait of David M., from the portfolio "New European Graphics, Portfolio V: German Artists"

Ernst Ludwig Kirchner

Tracing of Mosaic in Church of Hagia Sophia, Istanbul (Central Lunette of Narthex: Christ)

François Blanchart

Robert Nanteuil

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

Bartholomaeus Bruyn the Elder

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

Gerhart Hauptmann

Lovis Corinth

A Pyramid Lake Paviotso

Edward Sheriff Curtis

X-radiograph(s) of "Portrait of Jean de Carondelet"

Jan Gossaert

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

X-radiograph(s) of "Dr. Daniel Greenleaf"

Joseph Blackburn

X-radiograph(s) of "George Spaulding"

William Dunlap

X-radiograph(s) of "Meyssart family"

Abraham van den Tempel

Tetradrachm of Ainos

Stater of Pherai

Charles Lindbergh (1902-1974)

Frederick William Macmonnies

Altmann (Old Man) and Papa Sentis

Emil Nolde

Rulan Pian (1922-2013)

Stephen E. Coit Rulan Pian

X-radiograph(s) of "Portrait of Martin Luther"

Lucas Cranach the Elder

X-radiograph(s) of "La Donna della Finestra"

Dante Gabriel Rossetti

Frits Holm (1881-1930)

Albert Bruce Joy

[Artifact in Moritzburg Museum, Halle]

Lyonel Feininger

X-radiograph(s) of "Tommaso Inghirami"

Raphael

Bearded Man and Woman with Shawl, Lower East Side, New York City

Lewis Wickes Hine

X-radiograph(s) of "Isiah Thomas"

Ethan Allen Greenwood

William H. Harrison

Jewelry containing a silver denarius of Brutus

Caricature of an old or African woman

stater of the Acarnanian League

Koinon of Akarnania

Benjamin Franklin

Augustin de Saint-Aubin Charles-Nicolas Cochin le jeune

Drachm of Apollonia Pontika

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

Vincent van Gogh

Dr. Harvey Cushing (1869-1939)

Paul Adrian Brodeur

Napoléon I and Marie-Louise of Austria

Bertrand Andrieu

Fortune, after Guido Reni

Nathaniel Marchant Guido Reni

X-radiograph(s) of "Benjamin Lynde Sr."

John Smibert

Marcos - Palm Cañon Cahuilla

Edward Sheriff Curtis

Head of a Young Warrior

Untitled (portrait of girl with horse on shirt)

Ken Whitmire Associates