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Architecture of the Early Christian Church
![Plan of "Old" St. Peter's Basilica.](../../../../../../../../../figures.boundless-cdn.com/34041/full/ucetc1durra0m987z3yk.jpg)
Plan of "Old" St. Peter's Basilica.
One of the first Christian churches in Rome, Old St. Peter's followed the plan of the Roman basilica and added a transept (labeled "Bema" in this diagram) to give the church a cruciform shape.
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"640px-Old_St_Peters_Basilica_plan.png."
https://commons.wikimedia.org/w/index.php?curid=10899121
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