For those interested in Renaissance Italian costuming, check out Moda a Firenze, 1540-1580 : lo stile di Eleonora di Toledo e la sua influenza -- ISBN 8883048679. Fabulous, fabulous book (in Italian and English) that goes into incredible detail into the wardrobe of Eleanor of Toledo and a great resource for Florentine fashions.
Also, two of my favorite image databases are:
BildIndex -- huge art database, all in German. Use
Babelfish to help you translate. To search for portraits from a particular era: click on Expertensuche (top nav bar), type in your start and end dates in the top right boxes (von=from, bis=to) and then type "portraet" in the top left Gesamtindex box.
Joconde -- Art from French museums. Use
Babelfish to help you translate. To search for portraits from a particular era: click on Recherche avancée, then input the following: In Sujet représenté, type in "Portrait"; in Périod/Datation, input a century as ##E SIECLE (17E SIECLE=17th century); check off Avec Image.
And my favorite Elizabeth IS Cate Blanchett! Altho I am a heathen and have never seen Elizabeth R.