Pieter van Der Heyden art links 

Metropolitan Museum of Art Timetable of Art History  

Museum of Fine Arts, Boston  

Pieter van Der Heyden at the National Gallery of Art, Washington D.C.
The Ass at School, 1557

Cleveland Museum of Art, Ohio

Courtauld Institute of Art, London, UK
3 works by or related to the artist

Harvard University Art Museums, Massachusetts

Indianapolis Museum of Art, Indiana

Pieter van Der Heyden in the Los Angeles County Museum of Art Database

New York Public Library Digital Gallery
The Blind Leading the Blind, engraving after after Hieronymus Bosch

Staatsgalerie Stuttgart (in German)  
Invidia, ebgraving after Pieter Bruegel

Pieter van Der Heyden at the The British Museum, London, UK

Université de Liège Collections (in French)  

 

Pieter van Der Heyden in the Web Gallery of Art  

University of Michigan SILS Art Image Browser

 

Artarchiv Sample Artist Symbols + Monograms
Scroll down to monogram 460

 

Grove Dictionary of Art Online (excerpt)  

Union List of Artist Names (Getty Museum)  
Reference sheet with basic information about the artist and pointers to other references.