Atrium Insertion at the Asian Art Museum: New Staircase and Old Library Shell

Design a museum conversion of a beaux-arts civic library in the manner of Gae Aulenti, cutting a tall court through the centre and threading a single sculptural stair through it, its underside expressed as a clean folded plane. Compose the new stair spiralling in the light well, the old coffered ceiling and classical pilasters preserved at the edges, pale plaster and warm stone, an oculus skylight above, calm even daylight, low view up the stair, 24mm lens, interior photography, ultra photorealistic, 8K