The first Christian churches were modeled after the basilicas that the Romans employed as their government buildings
The word "basilica" describes a structure that serves as a meeting place. Basilicas served as both a venue for business dealings and the handling of legal affairs in ancient Rome.
A basilica's base was normally rectangular, divided into aisles by columns, and capped by a roof. When the pope travels to the diocese where the basilica is located, he meets the people there.
The basilica is unique because it includes a distinctive chair and an umbraculum, an altar decoration resembling an umbrella and signifying papal authority. The pope can travel to other locations.
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