Who is the painter of duchess in poem my last - robert?

The poem "My Last Duchess" by Robert Browning does not mention a specific painter of the Duchess. However, the poem is written from the perspective of a Duke, who is describing the portrait of his late wife to an emissary of a potential new wife.

The poem implies that the Duke commissioned the portrait himself and that it reflects his control and possessiveness over his deceased wife. The Duke uses the painting as a means to express his dissatisfaction with his former wife and to warn his potential new bride about his expectations.

While the poem doesn't name the painter, it does offer clues about the painting's style. It's likely that the painting was made in a realistic and somewhat formal style, common during the Renaissance period.