Annibale Fontana art links 

Drawings from the Biblioteca Ambrosiana, Milan

J. Paul Getty Museum, Los Angeles
3 works online by Fontana

Kunsthistorisches Museum Databank, Vienna (in German)  

Metropolitan Museum of Art Timetable of Art History  
Plaque: Hercules Overcoming the Centaur Nessus

Annibale Fontana at the National Gallery of Art, Washington D.C.
The Adoration of the Shepherds

Annibale Fontana at the Prado Museum, Madrid
Platter of the Twelve Caesars, ca.1580

Cleveland Museum of Art, Ohio

Annibale Fontana in the Los Angeles County Museum of Art Database

The Walters Art Museum, Maryland   NEW!

 

Wikimedia Commons Image Database  

World Visit Guide (formerly Insecula)

1200 Years of Italian Sculpture (mostly in Italian)  

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.