Who was the author who wrotewhich gave aristocrats directions on how to be a well rounded individual in book of Courtier?

The book of Courtier was written by Baldassare Castiglione. It was published in 1528 and is considered one of the most influential works of Renaissance literature. The book is a dialogue between four courtiers about the qualities that make a perfect courtier. These qualities include physical beauty, grace, intelligence, eloquence, and virtue. The book was widely read by aristocrats and other members of the upper class, and it helped to shape the ideal of the Renaissance gentleman.