Art journal databases are specialized - they're by authorities ("peer reviewed") and have special ways to get at art topics.
Comprehensive Art Search (Art & Architecture Complete, Art Index Retrospective, Art Abstracts) - the major journal article source for art; 1929-present. A suite of databases including Art Full Text, Art Index Retrospective, Avery Index (architecture), and Art Museum Image Gallery. This link works only for Duke IP-adress authenticated computers. For off-site validation users, use Art & Architecture Complete.
Bibliography of the History of Art - Broadest coverage, before 1970's strong French coverage
Jstor - limit to "Art History" or "History" in area content. Remember, latest 3 years not included. Images can be searched within results.
ARCHITECTURE
Avery Index - premier index for architecture journals, run by Columbia University.
MEDIEVAL HISTORY
ITER - Indexes journals covering European Renaissance (1300-1700) and medieval eras (400-1500).
International Medieval Bibliography (IMB) Covering all facets of medieval (400-1500) history and life in Europe, the Middle East and North Africa.
Bibliography of British and Irish History Index to articles and primary sources on British and Irish history from 55 BC.
RELIGION
ATLA Religion database - Articles on all aspects of religion, including historic. Great for medieval liturgies examples.