Plizio Visual Lab
Prague Astronomical Clock
The Prague Astronomical Clock, known as the Orloj, is a medieval engineering marvel located on the southern wall of the Old Town Hall. Installed in 1410 by Mikuláš of Kadaň and Jan Šindel, it is the third-oldest astronomical clock in the world and the oldest one still in operation. The clock consists of three main elements: the astronomical dial, the calendar dial, and the famous hourly show of moving figures. Every hour, the figures of the Twelve Apostles appear in the windows above the clock, accompanied by the figure of Death tolling a bell. According to legend, the clockmaker Hanuš was blinded after completing the work to ensure he could never replicate such distinctive craftsmanship. Despite suffering damage during World War II, the clock was meticulously restored and continues to captivate visitors from across the globe. It stands as more than just a timepiece; it is a symbol of Prague's enduring history and the sophisticated fusion of medieval science and art. The Orloj remains the beating heart of the Old Town Square, representing centuries of craftsmanship.
- Location: Czech Republic
- Top sights: Astronomical Clock · Old Town City Hall Tower · Old Town City Hall
- Nearby: Lužiny Housing Estate (8 km)
Best time to visit & climate
The most pleasant time to visit is Jun–Aug.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | -2 | -1 | 3 | 9 | 14 | 18 | 20 | 20 | 14 | 9 | 4 | -1 |
| Rain mm | 42 | 32 | 39 | 36 | 69 | 78 | 79 | 81 | 53 | 46 | 43 | 41 |
📋 Practical info
Geography
Facts
- Installed in 1410, making it over 600 years old.
- The oldest astronomical clock in the world still in operation.
- Features a mechanical show of the Twelve Apostles every hour.
- Displays Babylonian time, Old Bohemian time, German time, and Sidereal time.
- The calendar dial was added by Josef Mánes in 1865.
- Severely damaged by fire during the Prague Uprising in May 1945.
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
© OpenStreetMap contributors · OpenRouteService
Sights in the town Prague Astronomical Clock (10)
Mozart museum🏛 museum
Museum in a former monastery. Focuses on Wolfgang Amadeus Mozart's stays in Prague.
Galerie art
Art gallery in Prague's Old Town. Hosts rotating exhibitions of contemporary artists.
Prague Meridian
Meridian marker on Old Town Square. Indicates Prague noon.
Sex Machines Museum🏛 museum
Museum of mechanical sex devices. Exhibition of historical and modern machines.
Banksy Museum
Gallery featuring works of anonymous street artist Banksy. Prints and installations.
Sklářské muzeum Moser🏛 museum
Museum of the Moser glassworks. Showcases fine glass design and craftsmanship.
Saint Nicholas
Baroque church on Old Town Square. Known for its frescoes and dome.
Sights nearby
Frequently asked questions
When do the apostles move?
Does it cost money to see the clock?
Where exactly is the clock located?
How old is the Prague Astronomical Clock?
Can you climb the Town Hall tower?
Prague Astronomical Clock: where is it located?
Prague Astronomical Clock: what is there to see?
Prague Astronomical Clock: when is the best time to visit?
Prague Astronomical Clock: why is it worth visiting?
















