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

Peter Paul Rubens

X-radiograph(s) of "Annunciation"

Petrus Christus Jan van Eyck

X-radiograph(s) of "Pieta"

Rogier van der Weyden

X-radiograph(s) of "Man with Arrow"

Rogier van der Weyden

X-radiograph(s) of "Woman at Clavicord (Eleanor of Toledo ?)"

Jan van Hemessen

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

Hieronymus Bosch

Untitled (people in Native American costumes at Beaux Arts Ball)

Jack Gould

X-radiograph(s) of "Holy Family"

Joos van Cleve Quentin Metsys

X-radiograph(s) of "The Embassy"

Vittore Carpaccio

X-radiograph(s) of "Cassone (test on wood structure)"

Francesco di Giorgio Martino, called Francesco di Giorgio

Untitled (zookeeper feeding giraffe)

Jack Gould

Untitled (zookeeper feeding giraffe)

Jack Gould

Untitled (two giraffes in zoo)

Jack Gould

X-radiograph(s) of "Family Group"

Jan Hermansz van Bijlert

X-radiograph(s) of "Helena Fourment (?)"

Gaspar de Crayer Peter Paul Rubens

X-radiograph(s) of "Astronomer"

Jan Vermeer

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

Andrea del Verrocchio

X-radiograph(s) of "John Quincy Adams"

John Singleton Copley

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

Michiel Jansz. van Miereveld

X-radiograph(s) of "Holy Family (visitation with Saints)"

Luca Signorelli

X-radiograph(s) of "Mrs. Joseph Warren (Elizabeth Hooton)"

John Singleton Copley

X-radiograph(s) of "The Piazzetta, Venice"

Giovanni Antonio Canal, called Canaletto

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

Anthony van Dyck Cornelis Vos

X-radiograph(s) of "Sir Archibald Cambell"

George Romney

X-radiograph(s) of "Bacchanal"

Cornelis Holsteijn

X-radiograph(s) of "Interior"

Pieter de Hooch

X-radiograph(s) of "Samuel Shrimpton"

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

Reynier van Gherwen

Origen

Jacob Kainen

Untitled (zookeeper feeding giraffe)

Jack Gould

X-radiograph(s) of "Madonna and Child with St. John"

Jacobello di Antonello Michele da Verona Cristoforo Caselli

X-radiograph(s) of "Virgin Suckling Child"

Master of Flémalle Jacques Daret

X-radiograph(s) of "Cobbler"

X-radiograph(s) of "Girl at Half-open Door"

Barent Fabritius Rembrandt Harmensz. van Rijn

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

Deodato Orlandi

X-radiograph(s) of "Thomas Hancock"

John Singleton Copley

X-radiograph(s) of "Male Portrait"

Dieric Bouts

X-radiograph(s) of "Female Portrait"

Sebastiano del Piombo

Bacchus

Jean Lurçat

George Washington Bridge

Bobbi Carrey

X-radiograph(s) of "Pieta"

Konrad Witz

X-radiograph(s) of "Countess of Huntington"

Joseph Highmore William Hogarth

X-radiograph(s) of "Marriage of St. Catherine"

Lorenzo Lotto

X-radiograph(s) of "Toilet of Bathsheba"

Rembrandt Harmensz. van Rijn

Untitled (Griffelkunst 1989)

Sigmar Polke Griffelkunst-Vereinigung

X-radiograph(s) of "Betrothal of St. Catherine"

Hans Memling

X-radiograph(s) of "Lady Playing Spinnet"

Jan Vermeer

X-radiograph(s) of "Mattheus van der Broucke"

Samuel van Hoogstraten

X-radiograph(s) of "Girl in a Kitchen"

Adriaen van Utrecht

X-radiograph(s) of "Peter Pelham"

John Singleton Copley

X-radiograph(s) of "Richard Middlecott"

X-radiograph(s) of "William Temple, England"

Monte Cassino

Robert David Gauley

X-radiograph(s) of "Young Woman"

Jacob Adriaensz. Backer Rembrandt Harmensz. van Rijn

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

Giovanni Antonio Boltraffio

X-radiograph(s) of "Christ bearing the Cross"

Hieronymus Bosch

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

Sandro Botticelli (Alessandro Filipepi)

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

Juriaen Ovens

X-radiograph(s) of "head of Christ"

Rembrandt Harmensz. van Rijn

X-radiograph(s) of "John Endicott"

Attributed to John Smibert

X-radiograph(s) of "Rogers of Salem"

John Singleton Copley

X-radiograph(s) of "Sarah Kilby (Cunningham)"

John Greenwood

X-radiograph(s) of "Mona Lisa"

Leonardo da Vinci

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

Lorenzo di Niccolo