Elisabeth Jerichau-Baumann, German (born in Poland, died in Denmark), 1819-188: Italy; 1859; oil on canvas. 38 1/4 x 28 in. Ackland Art Museum, The University of North Carolina at Chapel Hill, Gift of Ruth and Sherman Lee, 2003.35.1.
Encyclopedias are a starting point – use these to understand basic concepts, find useful search terms, and locate more in-depth resources. Encyclopedia articles are not generally used as a source you would cite in a research paper. Follow the bibliography!