折り板クリスタルの市庁舎：コンクリートの彫刻的な幾何学

Design a town hall in the manner of Gottfried Böhm as a crystalline concrete mass of folded angular planes rising in a stepped silhouette above a small historic town, deliberately monumental yet built of the plainest material. Compose grey board-marked concrete faceted into sharp angular volumes with a jagged crown, tall narrow window slots cut at the folds, the mass stepping up from low surrounding rooftops, medieval tiled roofs and a church tower nearby for contrast, overcast German daylight, low three-quarter view from the street, 28mm lens, architectural photography, ultra photorealistic, 8K