History of physics to simplify their production. In heliocentric models of the Solar system, the Earth orbits the Sun along with other bodies in Earth's galaxy, a contradiction according to the Greek-Egyptian astronomer Ptolemy (2nd century CE; see above), whose system placed the Earth at the center of the Universe and had been accepted for over 1,400 years. The Greek astronomer Aristarchus of Samos (c.310 – c.230 BCE) had suggested that the Earth revolves around the Sun, but Copernicus' reasoning led to lasting general acceptance of this "revolutionary" idea. Copernicus' book presenting the theory ("De revolutionibus orbium coelestium", "On the Revolutions of the
Paris in the 16th century Beginning in 1522, wealthy Parisians loaned their money to the Bureau de Ville, the city government, which in turn made loans to the King. In exchange the King gave the city the right to collect certain taxes in Paris, and the Parisian investors received a healthy eight percent return for their loans to the city. By the second part of the 16th century, however, the Kings were so deeply in debt that wealthy Parisians refused to lend any more money; the King was forced to borrow money from Italian bankers, who received the right to receive a portion of French