Low, atmospheric interior beneath the choir: heavy barrel and groin vaults carried by squat piers; sarcophagi and effigy tombs in arched alcoves; candle niches and narrow slit windows provide faint light; worn, slightly damp stone floor with subtle reflections; stair rising toward the choir, the upper treads brightened by a shaft of light; carved capitals and blind arcading echo forms above; monochrome hand‑drawn/stipple‑engraving aesthetic, precise line‑weight hierarchy, fine hatching; serene, contemplative mood; no modern elements; high architectural detail.