Eratosthenes is most famous for making the first accurate measurement of Earth's circumference sometime around 240 B.C.
Answer: The period from Jackson’s inauguration as president up to the Civil War is known as the Jacksonian Era or the Era of the Rise of the Common Man. This period constituted great change and issues warranting debate, such as slavery, Indians, westward mobility, and balance of power between the executive and the legislative branches of government. The United States had no strict class system. Most Americans identified themselves into the middle class. The common man now had the right to vote, without the distinction of owning land, nominating candidates to office, and rewarding the politicians that represented the common man’s interests. The 1820s, a time of transition and transformation called for a man who could guide the people through the changeful age. The election of 1828 signaled a unique change; never before had a man who made his name and fortune outside the thirteen colonies been elected to the office of president.
The architectural features of Monticello which is based neoclassical ideals are the following: a center hallway and a parallel set of rooms to the structure, a mezzanine bedroom floor, an interior that is centered on the two large rooms which serve as an entrance hall museum, the octagonal dome with mars yellow walls and painted green floor, ground cooled air and heated floor, a large central hall and aligned windows were designed to permit a cooling air to pass through the house, and the octagonal cupola draws hot air up and out. The Monticello is comparable to Chiswick house in London which is a neoclassical inspired house by architect Andrea Palladio built in 1726-9.
Toussaint L'Ouverture was a house slave that was allowed to learn how to read and write by his owner. I have provided a biography that says his godfather was the one to teach him. (http://www.blackpast.org/gah/loverture-toussaint-1742-1803)