Prague Astronomical Clock: how to read it and when to watch the show

A crowd gathers in front of the Old Town Hall, a few minutes before the hour, and everyone looks up. A skeleton pulls a cord, a bell rings, little windows open and wooden apostles file past. A cockerel crows, everyone claps, and half of them are unsure whether the show was impressive or just sweet. It was both. It is also a clever piece of medieval engineering that tells you the time in several ways at once.

The long history and the legends live in our piece on the Orloj. This guide is the practical companion: how to read the dials, who the figures are and where to stand.

The short version

The clock was first installed on the Old Town Hall in 1410. Over the centuries it has been repaired, extended and restored many times. The apostle figures came with the restoration of 1865–66, and the clock had a major restoration that was completed in 2018. It is often described as the oldest astronomical clock still working, which is a reputation rather than an official ranking.

How to read the dials

The upper dial shows several things at once: the Sun and Moon against the zodiac, and the time in more than one system. Besides the ordinary hour it carries older ways of counting, so it looks bewildering. The trick is to ignore most of it and follow the golden Sun marker.

The lower dial is a calendar, with medallions for the months and a ring of zodiac signs. The medallions you see are copies, and the originals are kept in a museum.

The show

On the hour, Death (the skeleton) pulls a cord and rings a bell. Two windows above the dial open and the twelve apostles pass in procession. At the end a cockerel crows and the hour is struck. The whole thing takes less than a minute.

Beside the dial stand four figures, each an allegory of a human weakness, with Death as the reminder that time runs out. It is a medieval warning in wood and paint, and still a good one.

When to watch

The show runs on the hour during the day; check current times, because repairs, events and the season can change them. The most crowded times are mid-morning to late afternoon, especially in summer. The first show of the day and the last are calmer.

Arrive ten to fifteen minutes early. Stand in the middle of the square facing the tower, not hard against the wall, or you will crick your neck. Phone cameras struggle in the glare, so photograph the dials earlier, when the light is even. If you only want to study the dials, come between the hours.

What people get wrong

The tale of the blinded clockmaker, punished so that he could never build a rival, is a legend with no evidence behind it. Historians usually credit the original design to the clockmaker Mikuláš of Kadaň and the astronomer Jan Šindel. The apostles are a later addition, not part of the 1410 design. More folklore is in Prague legends every visitor should know.

The main dial also does not show the time the way a wristwatch does, which is why first-time viewers are confused. Do not worry if you cannot read it. The hourly show is the main event, and the dials are a bonus for those who stay.

Look down from the tower

You can look down on the square from the Old Town Hall tower, which has a lift and stairs and needs a ticket. The view across the red roofs is one of the best in the Old Town. Check the official sources for opening times. For other places to look down on the city, see best viewpoints over Prague.

Sensible expectations

The Orloj is a short show with a long story. If you expect fireworks you will be disappointed; if you come for the engineering and the history, it rewards you. Some visitors find the crowd more annoying than the show, which is why many Praguers watch from a café window or skip it altogether.

The crowd is also a favourite spot for pickpockets (pickpockets in Prague). For a quieter experience of the square, read Prague Old Town without the crowds. For the wider route, the clock is a stop on the Royal Route.

Quick answers

Frequently asked questions

How often does the Orloj show happen?

On the hour during the day. Check the current times, because they can change.

How long is the show?

Less than a minute, plus the hour strike.

Is the Prague Astronomical Clock the oldest in the world?

It is often described as the oldest astronomical clock still working. Treat that as a reputation rather than a ranking.

Do I need a ticket to watch?

No. The show is visible from the square for free. The tower viewing platform needs a ticket.

Arrive early, look at the dials and then let the skeleton do his work. A minute of wooden theatre has been drawing crowds for generations.