1) Painting technique 
Unione ( `uŋjonɛ ) is one of the four canonical painting modes of the Renaissance, along with sfumato, chiaroscuro, and cangiante. Unione is characterized by its sfumato quality, while still maintaining vibrant color. An example of this style is `La Belle Jardinière` or `Alba Madonna` by Raphael (http://glennis.net/real/raphaels-unione/) C...