Claudius Counted 5,984,072 Male Citizens

In 48 CE, Roman emperor Claudius conducted a census that counted 5,984,072 adult male citizens across the Roman Empire, slightly fewer than 6 million. The count excluded women, children, enslaved people, and free adult men who lacked Roman citizenship, so it did not represent the empire's total population. The total exceeded the figure recorded at Roman emperor Augustus's death by about 1 million, partly because Claudius founded colonies and granted their inhabitants blanket citizenship.

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