The Weltzeituhr: Why Alexanderplatz Has a World Clock

If you've ever arranged to meet someone at Alexanderplatz, chances are you said something like: "Let's meet at the World Clock." The Weltzeituhr — a rotating aluminum structure showing the time in 148 cities across all 24 time zones — has been Berlin's unofficial meeting point since 1969. Locals use it, tourists photograph it, and on any given evening you'll find groups of friends gathered around its base waiting for someone to show up.

But almost nobody who stands next to it knows why it's there. The Weltzeituhr wasn't built to help people tell time or meet friends. It was built to send a political message to the entire world — and the irony of that message is one of the best stories I get to tell on our tour.

Built for a Birthday Party

The World Clock was installed on October 2, 1969 — exactly one day before the 20th anniversary of the German Democratic Republic. That timing was everything. The entire redesign of Alexanderplatz in the late 1960s — the TV Tower, the Fountain of International Friendship, the Hotel Stadt Berlin, and the World Clock — was a massive propaganda project timed to celebrate two decades of East German statehood.

The GDR wanted to show the world — and especially West Germany — that the socialist state was modern, technologically advanced, and globally connected. The redesigned Alexanderplatz was supposed to be the showcase: a gleaming public square that proved communism could build a better city.

A Clock for a Country That Couldn't Travel

The designer, Erich John, created a clock that would showcase East Germany's connection to the wider world. The rotating cylinder displays the names of 148 cities across every continent. Moscow, Havana, Hanoi, Cairo, Beijing — all the capitals of allied socialist nations are prominently featured. On top of the cylinder sits a simplified model of the solar system, with the planets orbiting a central sun, suggesting that East Germany's vision extended beyond Earth itself.

Here's the irony that makes this story so perfectly Berlin: at the time the clock was built, most GDR citizens were forbidden from traveling to almost all of the 148 cities displayed on it. The Berlin Wall had gone up in 1961. East Germans couldn't visit Paris, London, New York, or even West Berlin — a city that was, in some cases, a 20-minute walk away. The Weltzeituhr showed you what time it was in Tokyo, but you couldn't go to Tokyo. You couldn't even go to the other side of your own city.

Pro tip: Look at which cities are listed and which are missing. The selection tells you a lot about East Germany's political alliances in the late 1960s. Some of the city names have been updated since reunification, but the basic structure hasn't changed.

The Design Details

The clock stands about 10 meters tall — roughly the height of a three-story building. Its main feature is the rotating aluminum cylinder, divided into 24 segments representing each time zone. The cylinder makes one full rotation every 24 hours, so the time displayed for each city is always accurate (assuming the mechanism is working, which, to be fair, it usually is).

The structure rests on a mosaic floor depicting a compass rose — a navigation symbol representing Berlin's position as a world city, at least in the eyes of the East German government. Every detail was carefully chosen to communicate power, progress, and global relevance. Whether the rest of the world agreed is another question entirely.

After the Wall Fell

When the Berlin Wall came down in November 1989, many GDR-era monuments, statues, and symbols were removed, renamed, or demolished. Streets named after communist leaders were given new names. Statues of Lenin were taken down. But the Weltzeituhr survived — largely because Berliners had already adopted it as something entirely separate from its political origins. It wasn't a communist monument anymore. It was just the place where you met your friends.

It was renovated in 1997 and again in 2015, and today it remains one of the most photographed and most-used landmarks at Alexanderplatz. Millions of people stand beside it every year having absolutely no idea they're posing next to a Cold War propaganda project designed to project an image of freedom in a country where freedom didn't exist.

Pro tip: The best photos of the Weltzeituhr are at night, when it's illuminated from below and the TV Tower looms behind it. It looks spectacular.

Start Your Tour Here

Our free walking tour meets right at the World Clock on Alexanderplatz — so you'll hear the full story of the Weltzeituhr, the TV Tower, and the GDR's grand redesign of the square before we even start walking toward our first stop.

Book your free spot now. Our free walking tour runs year-round through Berlin's historic city center. 12 stops from Alexanderplatz to Hackescher Markt. Tip-based, no fixed price.