The poem is a dramatic monologue spoken by an Italian Duke showing a portrait of his deceased wife, called his "last Duchess", to a representative of the Count. As he speaks, he reveals that he was possessive and jealous of his wife, believing she did not properly appreciate his high social status and wealth. He implies that he had her killed due to her friendly, appreciative nature which he saw as a fault. The ending reinforces the Duke's self-importance as he draws attention to another artwork, highlighting his wealth and power.