Which writer composed 'Il Cortigiano' (The Courtier), a work that significantly influenced the English royal court by offering nuanced advice on personal conduct and presentation?

Explanation

'Il Cortigiano' (The Courtier) was penned by Baldassare Castiglione. This influential Renaissance book shaped the behavior and etiquette of the English court by providing subtle guidance on how courtiers should present themselves with grace and tact.