Johann Michael Rottmayr art links 

Art Institute of Chicago

Courtauld Institute of Art, London, UK
3 pictures from Vranov Castle in the Czech Republic

Harvard University Art Museums, Massachusetts   NEW!

La Salle University Art Museum, Philadelphia   NEW!
The Lamentation (click "next" twice to see the painting)

Landesmuseum Joanneum, Austria (in German)  
Abraham and Isaac

National Brukenthal Museum, Romania

National Gallery of Slovenia, Ljubljana (in Slovenian)  
St. Eleonora, 1716

Österreichische Galerie Belvedere, Vienna

Residenzgalerie Salzburg, Austria
Glorification of St. Charles Borromeo
Homage to a Patron Goddess of the City

The Albertina Graphic Art Databank, Vienna (in German)   NEW!  

 

Wikimedia Commons Image Database  

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

Farbdia Archiv (Color Slide Archive) (in German)  
Thousands of photographs of fresco cycles and wall decorations in churches and other buildings in and around Germany.
Click "Galerie" for a normal overview; click "digilib" to zoom in.

 

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.

Oxford Dictionary of Art (eNotes)   NEW!