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Seems metal razor were invented at least 2000 years prior the Roman Empire. "Around 3000 BC when copper tools were developed, copper razors were invented. The idea of an aesthetic approach to personal hygiene may have begun at this time, though Egyptian priests may have practiced something similar to this earlier. Alexander the Great strongly promoted shaving during his reign in the 4th century BC because he believed it looked tidier." https://en.wikipedia.org/wiki/Shaving#History