自19世纪下半叶建成以来，位于布拉格Letná的前自来水厂综合体已经经过了多次改造，但只有水塔一直保留着其原始形式。包括蒸汽机机房在内的技术大楼都已经被几栋多层附属裙房所取代。近几十年来，该综合体一直被作为青年活动中心，即使未来还会经历被改造的命运，但这一功能还是会保留下来。

The complex of the former waterworks on Letná has undergone several conversions since it was constructed in the second half of the 19th century but only the water tower has been preserved in its original form. The technical buildings, including the steam machine engine room, were demolished and replaced with multi-story annexes. In recent decades the complex has been used as a youth centre and will retain this function once it has been renovated.

▼项目鸟瞰图，bird-eye’s view

从前，水塔是当地唯一的一个景观制高点，在水塔上可以欣赏到城市的全景。但随着时间的推移，周边环境迅速发展，水塔逐渐失去了其景观优势，被淹没在高楼林立的城市中；然而，建筑师设计的潜望镜则将景观归还给了水塔。建筑师将潜望镜安置在用来抽水的蒸汽机烟囱处。借助强大的光学和电子指导系统，这个潜望镜不仅可以用来欣赏城市的天际线和全景，还可以用来观测夜空中的物体，如月球、火星、木星、土星等等。

The water tower was originally the only local dominant point with a view of the city panorama. But over time the surrounding land was developed and the tower gradually lost its view of the city, it was blinded; however, our proposed periscope has returned its “sight”. We used the chimney of the steam machine for pumping water to locate the periscope. The periscope can be used to observe not only the horizon and city panorama, but also objects in the night sky, such as the moon, the planets Mars, Jupiter, Saturn and many others, thanks to the powerful optics and electronic guidance system.

▼从街道看水塔，views from the street

建筑师在安置原主水箱的空间的制高点处设置了一个聚会大厅。大厅的地板架高，配备有一个自带灯光设计的展览系统。这个大厅将被用于聚会、展览和音乐制作等用途。水塔的走廊、潜望镜观察舱和通向钟表机械装置处的椽子的检修楼梯，都可以通过这个大厅进入。

A meeting hall is proposed at the highest point of this space, in which the main water tank was originally situated. It is equipped with a floor with elevation and an exhibition system with lights. It will be used for gatherings, exhibitions and musical productions. The tower’s walkway, the periscope observation cabin and the maintenance stairway to the rafters, where the clock mechanism is located, are all accessible from this hall.

▼在聚会大厅中欣赏城市全景和星体，observing the city panorama and objects in the night sky at meeting hall