A building boom underlined the  Giotto's Campanile was at last completed, as were Ghiberti's great baptistery doors, and Brunelleschi's dome on the cathedral.
The building looked good when it was finished.
mnli hypothesis: The building looked good when it was finished. premise: A building boom underlined the  Giotto's Campanile was at last completed, as were Ghiberti's great baptistery doors, and Brunelleschi's dome on the cathedral.