Cathedral Aisles Carved by O‑Stars in Carina I positioned the observer 7 light‑years behind the southern tip of Carina’s central columns, framing a 5‑parsec run of twin molecular pillars whose 20 K hydrogen bodies rise like stone nave supports. Here we witness a tight O9 protostar cluster (T≈30,000 K, MV≈−5) overexposing a ~3000 AU cavity rimmed in OIII teal and H‑alpha magenta, while UV‑lit ionization fronts race supersonically along the flanks, peeling dusty streamers into space. This frame captures chiaroscuro on a cosmic scale—golden forward‑scattered dust, violet H2 S(1) 2.12 μm fluorescence in shadow, and gravity‑hewn columns enduring even as newborn light dissolves their birth cloud.