Answer:
Star of Jude patches.
Explanation:
The 'Star of Jude' patches were small, yellow patches of fabric with a star of David as well as the word "Jude" (Jew in german) that Jewish people had to sew into their clothes in order for them to be identified by the public. This allowed for public shaming and discrimination as Jewish people were branded by the small patch. It was a law heavily enforced, even wedding dresses and formal clothes not permitted from it.
The technique of Robert Browning in "my last duchess" is known as a dramatic monologue. This is so because all the poem is expressed in one voice only, as oppossed to a dialogue, where more voices would appear. And it is dramatic because it contains all the elements of drama.
