Who is Lord d Buckingham in The Three Musketeers?

Lord de Buckingham is a prominent character in Alexandre Dumas' novel "The Three Musketeers." He is a wealthy and influential English nobleman who becomes romantically involved with Anne of Austria, the Queen of France. His relationship with the Queen creates tension and intrigue, particularly as it sparks jealousy in Cardinal Richelieu and complicates the lives of the main characters, including d'Artagnan and the Musketeers. Buckingham's character embodies themes of loyalty and honor, as well as the political machinations of the time.