Representative Government is the principle of elected officials representing a group of people
The Volga River, 2,193 miles
Its the second one or the third one, I'm leaning towards the second though.
Answer:1543
Explanation:
While its dates are disputed, the publication in 1543 of Nicolaus Copernicus ‘s De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) is often cited as marking the beginning of the Scientific Revolution.
the two majors rivals were athens and sparta