Brunelleschi was a goldsmith. He entered a competition to sculpt the bronze doors of the Baptistery in Florence. However, he did not come first, and was so disappointed, he gave up sculpture and started to design buildings. Brunelleschi eventually got the job of designing the dome of Florence cathedral, which now towers above the city as a land mark of Florence. The building was very architecturally-advanced for its time. In fact, no other architect to this day has attempted such a wondrous feat of engineering. It consisted of 2 domes, each supporting the other. They were held together with a series of rings and chains. It was very hard to build domes in Renaissance times, as it was hard to stop the middle caving in.