The answer is Great Britain
The basic tool that Galileo used was crude refracting telescope.His initial version only magnified 8X but soon refined to the 20x magnification he used for his observations for sidereus nuncius. it had a convex objective lens and a concave eyepiece in a long tube.
It took them two thousand years to build the great wall. It was actually originally smaller independent walls but eventually Emperor Qin Shi Huang had the people join them up. <span />
Three main motivations for European exploration are the need to spread their religion (Christianity), improving the economy (acquiring more spices,gold,goods) and lastly, faster trading routes. Hope this helped :))
