The Art Crossword: Renaissance Edition

What do you call the artistic technique that creates contrasts of light and dark?

This spring, the Metropolitan Museum of Art will debut Raphael: Sublime Poetry, the first comprehensive exhibition dedicated to the Italian artist in the United States. Ahead of its awaited opening, test your Renaissance know-how with this month's themed crossword — including the technique that creates contrasts of light and shadow and, of course, a little Raphael trivia.