依河而建的科布伦茨最近举办了德国的联邦园艺博览会。这是一个为期185天的大型园艺盛会，有3000多种植物参展，还有许多园艺主题活动。比利时Dethier建筑事务所赢得了开放式画廊的设计权，所造建筑成为了这个盛会的重要组成部分。该画廊坐落于埃伦布赖特施泰因要塞，这是联合国教科文组织所确认的一处世界遗址，要塞旁边是摩泽尔河和莱茵河的交汇处。这个开放式画廊也是个三角形的观景台，建于高地，能够俯瞰令人感叹的城市全景和绿色植被。悬挑起来的观景台向山谷方向延伸了15米，离地面有10米，整体看去像是一个回形走廊。建筑选用了道格拉斯的冷杉和科尔顿钢梁，方便现场组织、快速建造。建筑与工程联合制成的这个观景台是一个轻量结构建筑，环形设计方便人们来往。整个画廊镶嵌于田园之中，似乎不需要任何支撑物。由于其巧妙结构，人们远远的就能看见它，且姿态优雅。它的水平结构也与山谷的风景完美的融为一体。周围的建筑也很重要，观景台的位置和形状深受要塞和花园小道位置的影响。
the riverside city of koblenz was host to the recent bundesgartenschau， a 185 day large-scale horticultural event that hosts about 3000 floral and garden-themed events. belgium-based dethier architectures winning entry for a open-sided gallery was built as part of the festival on the site of the ehrenbreitstein fortress， a UNESCO world heritage site which overlooks the confluence of the moselle and rhine rivers. the triangular belvedere is positioned on a plateau， optimal for stunning views of the city and greenery. the cantilevered form creates orthogonal elevated pathways， extending 15 meters out over the valley， and rises 10 meters above the ground. the material choice of warm douglas fir and ever-patinated corten beams made for an opportunity for prefabricated parts and rapid construction. a marriage of architectural research and engineering resulted in a lightweight structure with dynamic circulation. the lateral trusses create a mosaic of the surrounding countryside and allow the structure to be relatively free-standing. nature becomes a foreground， while the architecture finds its resonance in the landscape. the scale allows the structure to be seen from afar， but remain graceful; its horizontality allows it to blend harmoniously into the valley's landscape. the surrounding architecture was also important to the design in that the belvedere's location and angular shapes reflect the nearby fortress foundations and garden paths.


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