Your last duchess is based onwhat formal occasion?

"My Last Duchess" by Robert Browning is based on a formal occasion of a meeting between the Duke of Ferrara and an emissary seeking a new bride for the Duke. The poem unfolds during a conversation in the Duke's art gallery, where he showcases a portrait of his deceased wife, the last duchess. This setting emphasizes themes of power, jealousy, and the control the Duke exerts over the women in his life.