Baldassare Castiglione wrote the Book of the Courtier from 1508 until it was published in 1528. (B).
The Renaissance figure who wrote The Book of the Courtier is Baldassare Castiglione. This work describes the ideal behavior and qualities of nobles in a royal court and introduces the concept of 'sprezzatura'. Therefore, the correct answer is B. Castiglione.
;