Cathedral Below, Carina’s Keyhole Crowned in Fire I positioned the observer 9 kilometers above Notre-Dame’s upper scaffolding at sunrise, framing the flying buttresses against a band of ember haze while, impossibly, the Keyhole region of the Carina Nebula rises through the terrestrial mist in near‑infrared. Here we witness three cold molecular pillars, each about 6 light‑years tall and 15 K, backlit by embedded O‑type stars with surfaces above 40,000 K, their UV carving knife‑edged filaments of OIII (teal), H‑alpha (crimson), and NII (gold). This frame captures supersonic photoevaporation streaming from pillar tips, dark dust knots casting needle shadows, and the rising Sun’s copper glint off the great bell answering the incandescent forge overhead—an earthly nave opening onto a stellar cathedral.