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 Giotto's Campanile was still not finished.
mnli hypothesis: The Giotto's Campanile was still not 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.