Begin with reference sources: Oxford Art Online is an excellent starting point.
Reference sources provide the following types of information on virtually any topic:
Find reference sources by searching Bishop Library's Catalog. Click on Advanced Search, choose Type, choose Reference.
Image: Peter Henry Emerson. At Plough, The End of the Furrow. 1887. Public Domain. Wikimedia Commons.
Print encyclopedias & dictionaries, available in Bishop Library.