Answer :
In the building, the three barrel-vaulted bays to each side was the architectural support for the basilica building.
What is a basilica?
A basilica means the use of building as that of a meeting hall.
What is the Roman basilica?
During the Ancient Rome, the basilicas were building used be carried out business transactions.
In conclusion, the three barrel-vaulted bays to each side was the architectural support for the basilica building.
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