V Lomech 2376/10a, 149 00 Praha 4 - Chodov

Water tower in Letná, A periscope in a former chimney

We have ensured the manufacture and installation of a periscope which is with its height of 20 meters the highest in the world. It is located in a former chimney of a steam machine for water pumping in the water tower in Letná. The system consists of a telescope located in the interior of the chimney and the rotating head with a mirror that is installed on the top of the chimney and the entire tower.

  • The head of the periscope is made of a special ring collector of energy, which enables it to rotate in horizontal level practically to infinity because it is not connected to any cable.
  • The rotation of the head itself is regulated by the observer by using the touch control.
  • For safety reasons the position of sun is saved in the system, and when the direction of the mirror gets closer to it, the rotational movement of the head slows down and the machine tilts the mirror toward the ground.
The AVT Group a.s. was founded in 2013. Since the very beginning we have been following a clear vision - offering highly qualified services in the field of audiovisual technologies and room acoustics. Our team consists of many certified experts who have been working in this field since the turn of the millennium.

Since 2014 we have been certified QMS ISO 9001 from the renowned Quality Austria company.


V Lomech 2376/10a
149 00 Praha 4 Chodov
Metro Opatov
Czech Republic

Office Brno – JIC INBIT
Kamenice 771/34
625 00 Brno-Bohunice


+420 777 173 174
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