Roman 'emperors'
(..) You have done well, my new apprentice. Now, Lord Vader, go and bring peace to the Empire. I can’t watch any more. Destroy the Sith we must. Send me to kill the emperor. I will not kill Anakin. To fight this Lord Sidious, strong enough you are not. He is like my brother. I cannot do it. Twisted by the dark side young Skywalker has become. The boy you trained, gone he is. Consumed by Darth Vader. I do not know where the emperor has sent him. I don’t know where to look. Use your feelings, Obi-Wan, and find him you will. When was the last time you saw him? - Yesterday. (..)2005 Star Wars: Episode III - Revenge of the Sith