As a dealer, historian, advisor, writer, and expert, Butterfield has worked with many of the most distinguished private collectors and institutions in the world, including:
As a dealer, historian, advisor, writer, and expert, Butterfield has worked with many of the most distinguished private collectors and institutions in the world, including:
Musée du Louvre
The Metropolitan Museum of Art
National Gallery of Art
Kimbell Art Museum
National Gallery of Canada
Philadelphia Museum of Art
High Museum of Art
The Frick Collection
The National Gallery, London
National Galleries of Scotland
Los Angeles County Museum of Art
Seattle Art Museum
The Art Institute of Chicago
Phoenix Art Museum
Detroit Institute of Arts
Allen Memorial Art Museum
Art Gallery of Ontario
Eugene Victor Thaw Art Foundation
The Andrew W. Mellon Foundation
Lloyds of London
Sotheby's
And many private individuals