Robert Browning is known as the master of dramatic monologues which allows him to assume the persona of a series of different characters. Of course, "Porphyria's Lover" is an excellent example of this as he allows us to see the mind of an obsessed killer. However, he also does this in many other poems, such as "Rabbi Ben Ezra" and "My Last Duchess." This last poem is particularly fascinating in the way that it presents us with a monologue told from the point of view of a Duke who has clearly had his last Duchess put to death. The way in which he alludes to this in such a cursory way and how he presents himself provides a fascinating psychological study, especially when we learn at the end of his poem that he is conversing with somebody who is trying to arrange another marriage with his master's daughter with this disturbing Duke. Such poems demonstrate unequivocally that Robert Browning had an incredible understanding of the pyschology of human beings, and in particular its more disturbing elements.