Astronomical Clock

Overview

Perched proudly on the southern wall of the Old Town Hall in Prague's historic Old Town Square, the Prague Astronomical Clock, known locally as the Orloj, is far more than just a timepiece. Dating back to 1410, it holds the distinction of being the world's third-oldest astronomical clock and the oldest still in operation. This intricate medieval marvel captures the imagination of millions annually, serving as a vibrant testament to Bohemian craftsmanship, scientific ingenuity, and enduring cultural heritage. It not only tells time but also meticulously tracks celestial movements, displays zodiac signs, and preserves unique medieval timekeeping traditions. Its hourly spectacle, featuring animated figures, is a beloved tradition that draws crowds eager to witness history come alive.

History & Cultural Background

The Orloj's origins trace back to 1410 when it was first installed. The oldest parts, including the mechanical clock and the astronomical dial, were created by horologist Mikuláš of Kadaň in collaboration with Jan Šindel, a professor of mathematics and astronomy at Charles University. This partnership of technical skill and astronomical knowledge was crucial in creating a device that accurately represented the then-understood cosmos. Over the centuries, the clock underwent significant modifications and repairs. Around 1490, the calendar dial was added, and the clock's facade was adorned with Gothic sculptures. Later additions included wooden statues in the 17th century and the iconic figures of the Apostles during a major repair between 1787 and 1791. The golden figure of a crowing rooster was incorporated around 1865. The clock has bravely withstood numerous historical upheavals, including heavy damage during the Prague Uprising in May 1945, when it was fired upon by Nazis. Despite such challenges, dedicated efforts always ensured its repair and restoration, preserving its technical, artistic, and spiritual integrity.

What Makes It Special

The Prague Astronomical Clock is a complex masterpiece composed of three main components. The most striking is the **Astronomical Dial**, a mechanical astrolabe representing the position of the Sun and Moon in the sky, along with various astronomical details. It displays multiple time systems, including Old Bohemian time (starting at sunset), Babylonian time (dividing daylight into 12 hours), and Central European time (indicated by Roman numerals). The dial's background represents the Earth and the local sky, with a blue circle for Earth and the upper blue indicating the sky above the horizon. A zodiacal ring, depicting the twelve zodiac signs, shows the Sun's position on the ecliptic.

Above the main dial, small windows open hourly (from 9 AM to 9 PM) to reveal 'The Walk of the Apostles'. Christ leads his disciples out, parading in sequence, while allegorical figures flanking the clock come to life. These include Vanity (a man with a mirror), Avarice (a businessman with a moneybag), Death (a skeleton ringing a bell and reversing an hourglass), and a Turk (representing lust or extravagance).

The lowest part is the **Calendar Dial**, added around 1490 and later recreated by Josef Mánes. It displays the date, zodiac signs, and medallions representing the months through allegorical scenes of rural life. This combination of timekeeping, astronomical display, and animated artistry makes the Orloj a unique cultural and scientific artifact.

Stories, Fun Facts & Local Details

Legends woven around the Orloj add to its mystique. The most famous tale recounts that Master Hanuš, who was once believed to have rebuilt the clock in 1490, was blinded by the Prague councillors to prevent him from replicating his magnificent creation elsewhere. In revenge, he supposedly disabled the clock, and it remained inoperable for decades. This dramatic story, though historically disputed regarding Hanuš's role, highlights the clock's perceived irreplaceable value.

Another local legend suggests that if the skeleton figure on the clock ever stops, it portends bad times for the Czech nation. Only a boy born on New Year's night, racing from Týn Church to the Town Hall before the clock's final strike, can break this curse. The Orloj also marked its 600th anniversary in 2010 with a spectacular light show projected onto the tower, depicting its history and intricate workings. While much of the clock remains original from the 15th century, some recent renovations, like the 2018 recreation of the calendar dial, have sparked minor controversies over artistic interpretations.

Visitor Perspective

The Prague Astronomical Clock is located in the heart of Old Town Square, easily accessible to all visitors. The hourly show, which runs from 9 AM to 9 PM daily, is a must-see. To fully appreciate the spectacle without excessive crowding, especially during peak seasons, it's advisable to arrive a few minutes before the hour. Visiting on weekdays or early mornings can offer a more tranquil experience. While admiring the clock from the square is free, visitors can also climb the Old Town Hall Tower for a fee. The tower, accessible via a modern elevator, offers breathtaking panoramic views of Old Town Square and the sprawling city of Prague, providing a unique vantage point of this architectural gem and its surroundings.