The New Century Italian Renaissance Encyclopedia. (Ref. DG 537.8 .A1 N48)
A Concise Encyclopaedia of the Italian Renaissance. (Ref. DG 445 .C66)Europe, 1450-1789. (Ref. D 209 .E97 2004) This is a 6-volume set; a good place to explore a topic.
The Oxford Dictionary of the Renaissance. (Ref. CB 361 .C27 2003)
Dictionary of the Renaissance. (Ref. CB 361 .S45)
Encyclopedia of the Renaissance. (Ref. CB 361 .B43 1987)
Gateways and Directories
The Renaissance - This is a good place to start; its scope includes timelines, comprehensive sites, the scientific revolution, humanism and more.
Renaissance History Gateway - There are some good sites here on art and architecture, science, literature, digital libraries, exhibits, and da Vinci.
Italian History Index: Renaissance and Modern Italian History - This site is a mélange of bibliographies, texts, essays. Some are in Italian. However, note the topical features such as biography, demography, and women--to name but a few. Again, many sites are in Italian.
Wess Medieval and Rennaissance Web This is an important source;includes organizations,,texts,journals,images.
Web Museum: La Renaissance: Italy - This is an essay that describes the Renaissance. There are several links in it.
The Civilization of the Italian Renaissance by Burckhardt
Be sure to look at the Gateways for other online texts.
Maps and Atlases