Knowledge of Brunelleschi

When Brunelleschi told the governments in Florence that he could make the dome without the scaffolding, and the people laughed at him and treated him as a total looser. After that he told the people this. "Try to make an egg sit on its bottom" the people tried and tried but they had failed. Brunelleschi showed them by slightly cracking the egg, and the people gasped. They had finally agreed on making of the dome.