For 10 points, name this royal title held by a character who, in Henryk Sienkiewicz's ("shenÂ­KYEHÂ­vitch's")
One of these people hosts a "floating feast" featuring butterflyÂ­shaped boats at which his veiled wife declares her love to the protagonist in the woods. The lover of one of these people commits suicide after seeing an enchantress drug and drown a sacrificial falcon. A man with this title orders the death of a talkative merchant who then has his tongue torn out and is fed to a bear. That man with this title is forced to (*) spare a girl and her giant servant after the giant breaks the neck of a bull. Marguerite Yourcenar wrote the memoirs of a person with this title. A novel set during the reign of one of them centers on the protagonist's love for the slave girl Ligea. For 10 points, name this royal title held by a character who, in Henryk Sienkiewicz's ("shenÂ­KYEHÂ­vitch's") Quo Vadis, fiddles while his capital burns.
One of these people hosts a "floating feast" featuring butterflyÂ­shaped boats at which his veiled wife declares her love to the protagonist in the woods.
Emperors of Rome [prompt on partial answers like "emperors" or "rulers of Rome"]