Blogs
- The First Book of Fashion
 - The Art of Google Books
 - BibliOdyssey
 - Erik Kwakkel
 - Making and Knowing
 - Painter’s Progress (Nora Lehmann)
 
Journals
Libraries and Digital Collections
- Anatomia (digital collection of anatomical images, University of Toronto Rare Book Library)
 - ART-Dok (full text digital repository, Heidelberg University Library)
 - Munich Digitization Center (digital collection of the Bayerische Staatsbibliothek)
 - World Digital Library
 
Museums
- Google Art Project
 - Metropolitan Museum Collections Search
 - National Gallery London. I especially like the “paintings room-by-room” feature.
 - Victoria & Albert Museum Collections Search
 
Online Databases
- Die Hausbücher der Nürnberger Zwölfbrüderstiftungen
 - Kunera (pilgrimage badge database)
 - Medieval Source Book, Full Text Sources (Fordham)
 - Wiktenauer (historical martial arts)
 
Online Exhibitions
- Heavenly Craft: The Woodcut in Early Printed Books (Library of Congress)
 - St. Wolfgang Virtual Altar
 - The Sistine Chapel (hi res, 360 degrees)
 - Altar der Stadtpatrone (Stefan Lochner)
 
People
Productivity
- Daily Routines
 - Miriam Posner
 - Study Hacks (Cal Newport)
 
Tools for Learning, Teaching, and Writing
- Heilbrunn Timeline of Art History (Metropolitan Museum of Art)
 - 750words.com
 - Professor David Young Kim’s tips on writing art history term papers
 
Etc.