Rheinturm

The Rheinturm (pronounced [ˈʁaɪntʊʁm], 'Rhine Tower') is a 240.5-metre-high (789 ft) concrete telecommunications tower in Düsseldorf, capital of the federal state (Bundesland) of North Rhine-Westphalia, Germany. Construction commenced in 1979 and finished in 1981. The Rheinturm carries aerials for directional radio, FM and TV transmitters. It stands 172.5 metres (564ft) tall and houses a revolving restaurant and an observation deck at a height of 168 metres (551ft). It is the tallest building in Düsseldorf. The Rheinturm was inaugurated on 1 December 1981. It contains 7,500 cubic metres of concrete and weighs 22,500 tons. Before October 15, 2004, when an aerial antenna for DVB-T was mounted, it was 234.2 metres (768ft) tall. The observation deck is open to the public daily from 10:00 to 23:30. As a special attraction, a light sculpture on its shaft works as a clock. This sculpture was designed by Horst H. Baumann and is called Lichtzeitpegel (light time level). The light sculpture on the Rheinturm is the largest digital clock in the world. The clock is a 24-hour clock with six sets of lights, two each for the Hour (00 to 24), Minutes (00 to 60), and Seconds (00 to 60), to be read from top to bottom.

Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).