This summary provides background information on Robert Browning's poem "My Last Duchess" in 3 sentences:
The poem describes an interaction between the Duke of Ferrara and an envoy of his new bride's father. Through his conversation with the envoy, the Duke reveals that he had his last Duchess killed because she was too cheerful with others. The summary also mentions that the poem is written as a dramatic monologue told from the perspective of the Duke and alludes to themes of control, jealousy, and objectification of women.