How was the roman senate composed?

Answer:
The Roman senate was composed of roughly 600 men. At the start of the republic they were all patricians, but after the plebeians gained rights, they too could become senators. If a person were elected to the office of quaestor, he was automatically a member of the senate. A tribune of the plebs also had a seat in the senate. Dictators and emperors could appoint men to the senate.
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