You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: ASTRONOMER'S DICTIONARY 
Clue: This word comes from a Greek phrase meaning "circle of animals"
zodiac

Category: ART 
Clue: He said he painted one his masterpieces with his "beard turned up to heaven"
michelangelo

Category: ROYALTY 
Clue: This king was the great-grandfather of France's King Louis XV

louis xiv

