Louis xvi was an auto crat that ruled france
He ruled most of Western Europe from 768-814. And in 800 he was crowned emperor of the romans
She discovered a a skull fossil of an ancestor of apes and humans
An important scientist at the time, besides, those who were mentioned was Copernicus - A.
Spartacus was just a slave general in the Roman republic.
Rousseau was a philosopher.
Plato was a philosopher as well.
The correct answer for that reason is Copernicus, he was an astronomer and a major figure at the time.