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

▼聚会大厅，meeting hall

大厅的下面是蒸汽机“第一锅炉操作员”的公寓，建筑师在此设置了一个图书馆。图书馆二层通高，琳琅满目的书籍堆满了靠着墙壁放置的书架，营造出一种宁静而发人深省的氛围。阳光透过窗户洒进室内，读者们可以坐在窗边宽敞的长椅上阅读。自带一个小茶室的阅览室与图书馆相连。

A library has been established on the level below the hall in the steam machine’s “first boiler operator’s” flat. The books cover the walls of the entire room on two levels and contribute to a peaceful and thought-provoking ambiance. The windows admit daylight and readers can sit in front of them on spacious benches. The reading room with tea-room is connected to the library.

▼二层通高的图书馆，library with two levels

水塔剩余的楼层则被改造为俱乐部空间。每个俱乐部都有自己独立的卫生设施和小厨房。俱乐部室内的家具布置则可以让游客回忆起这里的历史——这里曾是“第一和第二机械工程师”的公寓。

The clubhouse areas have been designed on the remaining tower levels. Each clubhouse has its own sanitary facility with kitchenette. The layout and location of the furniture is intended to remind visitors of the fact that the “first and second machine engineers’” flats were located in these areas.

▼运动俱乐部，clubroom for sports section

▼绘画和雕塑俱乐部，painting & sculpture workshop and clubroom

▼侦探俱乐部，scout clubroom

此外，建筑是还在主楼梯间的门厅里放置了一座傅科摆。这个非凡的实验设备证明了地球自转的事实，于1850年左右（Letná自来水厂建造的前不久）首次在巴黎的Pantheón进行展出。

A Foucault pendulum has been installed in the foyer of the main staircase. This remarkable experiment demonstrates the rotation of the earth around its axis and was first displayed in the Pantheón in Paris around 1850 (shortly before the water works on Letná were built).

▼水塔主楼梯，tower main staircase

▼塔内设施，built in facilities in the tower

水塔周边的附属裙房则服务于青少年儿童组织协会，满足学前设施的要求。每个区域都有独立的入口。建筑的平屋顶被改建成露台和花园，而幼儿园则在首层空间内单独设置了其独属花园。此外，裙房内还有一个宽敞的多功能厅。

▼舞蹈、礼堂和影院综合空间，hybrid of dance hall, auditorium and cinema

The surrounding annexes are used for the requirements of the Children and Youth Organisation and the pre-school facility. There is a separate entrance to each area. The flat roofs are converted into terraces and gardens and the pre-school has its own separate garden on the ground floor level. This part of the building also includes a spacious multi-functional hall.

▼幼儿园，kindergarten

▼附属裙房的内置设施，built in facilities

在建筑层面上，这座综合体经历了精心的翻新和改造。在整个改造过程中，建筑的所有历史痕迹都被保留了下来。建筑师并不刻意区分或者分类各个时期的建筑元素，而是对它们一视同仁。最终，建筑不仅呈现出工艺的高质量，更展示了各个历史时期的建筑细节。19世纪木纹窗的旁边便是20世纪50年代、60年代和70年代的房门，以及21世纪的铝窗、胶木、黄铜和钢窗家具。这些元素共同塑造出一个似乎是由时间创造出的拼贴画般的建筑空间。

The complex has been carefully renovated from the architectural aspect. All the layers of history, from construction to the present, have been preserved during the modification works. We do not differentiate or categorise the individual architectural elements but preserve them identically. The result is a structure that complexly presents the quality of the craftwork and details of various periods. You can find brush grained window from the 19th century next to doors from the nineteen-fifties, sixties and seventies. Aluminium windows from the 21st century, Bakelite, brass and steel window furniture. All composing a spatial architectural collage as it was created by time.

▼轴测图，axonometric view

▼基地环境，situation broader

▼总平面图，site plan

▼首层平面图，ground floor plan

▼水塔各层平面图，plans of tower

▼南立面图，south elevation

▼北立面图，north elevation

▼东立面图，east elevation

▼西立面图，west elevation

▼水塔剖面图，section of tower

▼总平面概念分析图，situation conceptual

▼天文台概念图，scheme of observatory

▼聚会大厅平面布置分析图，diagrams for the arrangement of meeting hall