The Book of the Courtier (Il Cortegiano), describing the behaviour of the ideal courtier (and court lady) was one of the most widely distributed books in the 16th century. It remains the definitive account of Renaissance court life. This edition, Thomas Hoby's 1561 English translation, greatly influenced the English ideal of the "gentleman". Baldesar Castiglione was a courtier at the court of Urbino, at that time the most refined and elegant of the Italian courts. Practising his principles, he counted many of the leading figures of his time as friends, and was employed on important diplomatic missions. He was a close personal friend of Raffaello Sanzio da Urbino, better known as Raphael, who painted the sensitive portrait of Castiglione on the cover of this edition.