I would say that the single most influential achievement was made by Johannes Gutenberg when he invented the printing press in 1450. That enabled scientific discoveries to reach more people and promote more scientific achievements.
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He was very cruel to the Russian people and was brutal to those who opposed him.
Latin America.
It was shaped this way so that the sound would echoe louder, since there were no microphones.
Since the whole Roman empire ended in the 1400s, it is likely for the Roman art to end somewhere around that time. It is not certain, but this date is probably likely.
some achevments were erning the rights to vote and to be treated equally and vote for who thay want to be president.