Does the poem "My last Duchess" appear to be about power or conflict or both?

"My Last Duchess" by Robert Browning is narrated in the first person by the Duke of Ferrara. Although he attempts to convey a positive impression, as with many of Browning's dramatic monologues, the Duke gradual reveals his true nature over the course of the poem, which is possessive and controlling. 

The Duke is often described as a "collector", a person who glorifies himself by collecting objects and sees his own self-worth as reflected in and perhaps...

"My Last Duchess" by Robert Browning is narrated in the first person by the Duke of Ferrara. Although he attempts to convey a positive impression, as with many of Browning's dramatic monologues, the Duke gradual reveals his true nature over the course of the poem, which is possessive and controlling. 

The Duke is often described as a "collector", a person who glorifies himself by collecting objects and sees his own self-worth as reflected in and perhaps even determined by the qualities of the things he possesses. He seems to have regarded the Duchess purely as a possession; the painted version of the Duchess is almost more satisfying to him than the actual person was.

Many of the Duke's statements about the Duchess reflect his desire to control her as he would control a piece of artwork. That he resents the Duchess having an independent will is seen in the lines:

...  and if she let

Herself be lessoned so, nor plainly set

Her wits to yours, forsooth, and made excuse—

E’en then would be some stooping;