Polidoro Lanzani art links 

Fine Arts Museums of San Francisco
Rest on the Flight to Egypt, ca.1550

Fitzwilliam Museum at the University of Cambridge, UK
Holy Family with the infant St John Baptist and St Catherine

Kunsthistorisches Museum Databank, Vienna (in German)  

Polidoro Lanzani at the National Gallery of Art, Washington D.C.
Madonna and Child and the Infant Saint John in a Landscape, 1540/50

Courtauld Institute of Art, London, UK
Virgin and Child with Saint Catherine and Saint Jerome in a Landscape

Harvard University Art Museums, Massachusetts   NEW!

State Museums of Florence Digital Archive, Italy

 
National Art Databases and Museum Inventories:

Joconde Database of French Museum Collections (in French)  

 

Polidoro Lanzani in the Web Gallery of Art  

Bildindex der Kunst und Architektur (in German)  
(a welcome screen is displayed for a couple of seconds before the search results appear)

 

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.