PERSON@1 's first work at ORGANIZATION@1 's was to design the baldacchino , a pavilion-like structure tall and claimed to be the largest piece of bronze in the world , which stands beneath the dome and above the altar .

PERSON@2 and niches PERSON@1 's first work at ORGANIZATION@1 's was to design the `` baldacchino '' which is like a tent or `` pavilion '' above the High Altar .
