World Clock (Alexanderplatz)

By reading the markings on its metal rotunda, the current time for 148 major cities from around the world can be determined.

In July 2015, the united German government declared the clock as a historically and culturally significant monument.

[2] The sixteen ton world clock was opened to the public on 30 September 1969, shortly before the twentieth anniversary of the German Democratic Republic, along with the Berlin TV Tower (Fernsehturm).

Twenty cities that were omitted by the DDR for political reasons, such as Tel Aviv, Cape Town, and Seoul, were also added to the clock.

[5][6] The main feature of the World Clock is a large twenty-four sided column (the cross-section of which is a regular icositetragon).

To read the clock, a user finds the side of the icositetragon which corresponds to the city or time zone they are interested in and notes the number under it.

Once per minute, an artistic sculptural rendering of the Solar System made of steel rings and spheres rotates.