The most significant architectural achievements of the entire Renaissance was undoubtedly the construction, by Filippo Brunelleschi, of the dome over the Florence Cathedral. ... The dome was built without employing centring (a wooden or iron structure) to support the masonry.
<span>A system for exchanging currencies between countries. Because they need to be able to redeem the money they earned. Without that system Jiang would not be able to sell things with other Countries.</span>
