Construction on Florence's grand cathedral began in 1296.Over a hundred year later, however ,the structure remained unfinished ,with an enormous hole in the roof .The designers had intended to top the cathedral with the world's largest dome , but this plan was stymied by architectural limitations. The main factor stalling progress was the fact that no one knew how to create such a massive cupola without large, cumbersome support systems.
what is the meaning of cupola as used in the passage?
While the political feats of her husband, President Chiang Kai-shek, may be more widely recognized soong Mei-lings's accomplishment are just as notable. As first lady, soong Mei-ling introduced her husband to Western culture and ideas. Likewise, she served as her husband's emissary, or spokenperson, to the west. During a visit to the United States in 1943, soong Mei-ling became the second woman to address a joint session of the u.s. congress. the trip earned her the esteem of the American public, who praised her