In the ninth century, the clergy and choir stalls were arranged in front of the presbytery, so that the naijin included that choir space, aisles, ambulatory corridors, and apsidal chapels.
9世紀になると、プレステビリの前に聖職者聖歌隊席が設けられ、この空間と側廊、周歩廊、祭室も含めて内陣とされる。