X-radiograph(s) of "Chess Players"

X-radiograph(s) of "Samson and Dalilah"

Anthony van Dyck

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

Frans Hals II

Sketch of a Woman Reading a Book

William Valentine Schevill

Sketch of a Man and a Woman

William Valentine Schevill

X-radiograph(s) of "Count Rumford"

Thomas Gainsborough

X-radiograph(s) of "Federigo Gonzagaa"

Francesco Francia

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

Gaspar de Crayer Peter Paul Rubens

X-radiograph(s) of "[add work title]"

Bust of a Boy

Cornelis Visscher

Saint Lucy; verso: Two Fighting Soldiers

Unidentified Artist

Arthur of England, from the Tomb of Maximilian; verso: Sketches of a Woman

John Singer Sargent

Head of a Woman (Elizabeth Dawson?)

James Abbott McNeill Whistler

Head of a Man

Unidentified Artist

X-radiograph(s) of "Annonciation"

Master of Flémalle Jacques Daret

Head of a Woman with her Hair Up, in Profile

Washington Allston

René de Carbonnel, Marquis de Canisy

François Quesnel

Boy Squatting by a Fence

Unidentified Artist

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

Jacob Adriaensz. Backer

Niagara in Winter

Frederick William Lock

Draped Model; verso: Nude Model

James Abbott McNeill Whistler

Untitled (portrait of a soldier and two soldiers in a village, Vietnam)

Gordon W. Gahan

Housing Development, Berlin-Wannsee, 1930-1931: Perspective sketch

Walter Gropius

Untitled (Dr. Herman M. Juergens looking through microscope)

Gordon W. Gahan

X-radiograph(s) of "Nativity"

Giovanni di Paolo

Scenery

Anneliese Hager

X-radiograph(s) of "Pieta"

Marco Basaiti