Below are links to reference sources and collections that are most useful for these subjects:
The Hutchinson Dictionary of Symbols in Art
Brief entries on secular and religious symbols
Encyclopedia of Comparative Iconography: Themes Depicted in Works of Art
Themes from biblical, mythical & literary narratives. Substantial entries include selected examples of art work and further reading
The Aam Guide to Provenance Research
Authoritative resource for tracing the ownership history of works of art
Reference sources can include encyclopedias, bibliographies, dictionaries, handbooks, and atlases.
You can find the Library's collection of reference books on Floor 1 of Frost. We also have many online databases that include collections of edited scholarly encyclopedias, dictionaries, and other reference sources.