It's often been said that the kings of Persia were "kings of kings". In regard to the monarch's appointed satraps, how similar is this to feudalism in Europe?
Similarly, how were classes typically arranged? Were the lowest slaves or something more similar to serfs?
Which time period? Persia existed under that name until 1935, when it changed its name to Iran. Or alternatively until the Sassanids were conquered by the Arabs. It was called Parthia by the Romans.
Do you mean at the time of the movie "300 (2006)"?