The poem describes an interaction between the Duke of Ferrara and a representative of the count, in which the Duke discusses his late wife, referred to as "My Last Duchess," implying that he had her killed due to her inappropriate behavior. Through his words and mannerisms, the Duke reveals himself to be a controlling and arrogant man who expects absolute obedience and feels entitled to take extreme actions if he believes his status has been disrespected. The monologue provides insights into the Duke's sinister and tyrannical character through his boasting about his wealth and social standing coupled with his implication that he had his wife murdered.