(Kelly of the Clue Crew shows an architectural plan on the monitor.) Leading from the entry to the altar, it's this section of a church that's flanked by the aisles
It can be located just inside the entrance of the church, or in the 
nave in front of... [DOC] [TLE] Medieval churches: sources and forms | Romanesque | Latin ... [PAR] Floor plan of the Roman Basilica of Maxentius and Constantine, 308-312 C.E.