Severo da Ravenna art links 

Severo da Ravenna: Sea Monster
Photograph by Flickr user "Quistnix", Creative Commons licensed

Severo da Ravenna at the Detroit Institute of Arts, Michigan

Fine Arts Museums of San Francisco
Altar candlestick

Severo da Ravenna at the National Gallery of Art, Washington D.C.
5 works by Severo da Ravenna

Severo da Ravenna at the Rijksmuseum, Amsterdam
Bust of a man (possibly by Tullio Lombardo)

Rijksmuseum Research Database, Amsterdam (in Dutch)  

Cleveland Museum of Art, Ohio

Frick Art and Historical Center, Pittsburgh, Pennsylvania
Venus with Apple

Frick Collection, New York City
6 works online

Harvard University Art Museums, Massachusetts   NEW!

National Gallery of Victoria, Australia

National Museums and Galleries of Wales

 
National Art Databases and Museum Inventories:

Art Fund for UK Museums

 

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

California State University WorldImages Database  

 

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.