芝生の下の円形天窓：埋められた展示ホール

Design an underground gallery in the manner of Hans Hollein's Städel extension — a column-free hall entirely beneath a public lawn, lit only by a field of circular roof lights of graduated diameter that read from above as a pattern of glass discs set in the grass. Compose a broad low gallery with a gently domed white ceiling pierced by 195 round openings of varying size, soft even daylight falling through them onto a pale resin floor, large contemporary works on freestanding walls, no visible artificial fitting, calm diffuse light, wide upward view, 24mm lens, interior photography, ultra photorealistic, 8K