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Zimmer tower: world’s most complicated clock

Zimmerplein 18, 2500 Lier, Belgio ★★★★☆ 148 views
Sienna Malone
Lier
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About Zimmer tower: world’s most complicated clock

Zimmer tower: world’s most complicated clock - Lier | Secret World Trip Planner

The little town of Lier contains three extraordinary clocks constructed in the 1930s by the local watchmaker and amateur astronomer Lodewijk Zimmer.

Zimmer tower: world’s most complicated clock - Lier | Secret World Trip Planner

He began by building a beautiful astronomical clock on the outside wall of an abandoned tower from the fourteenth century. It features two globes decorated in blue and gold and ten clock faces with signs of the zodiac, tides in Lier, phases of the moon, days of the month, months of the year and other arcane facts. Zimmer went on to design a Wonder Clock which he exhibited at New York’s World Fair in 1935. Described by the New York Museum of Science as ‘the outstanding wonder of the age,’ it is now displayed in a small pavilion next to the Zimmer Tower.

Three years in the making, it was an extraordinary construction with 93 small dials and 14 automata. The various clocks display the time divisions of the world, the movements of the planets, high and low tides in the world’s principal ports and dozens of other details. The fastest clock hands revolve once around the dial in one-hundredth of a second, while the slowest rotates once every 26,000 years.

A small crowd gathers each hour on the square in front of the Zimmer Tower to watch a mechanical show on the side wall. An old man strikes a bell, the red shutters flip open and a series of portraits slowly slide into view, representing one hundred years of Belgian history.

Derek Blyth’s hidden secret of the day: Derek Blyth is the author of the bestselling “The 500 Hidden Secrets of Belgium”.

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Frequently Asked Questions

The Zimmer Tower in Lier, Belgium houses three extraordinary astronomical clocks built in the 1930s by watchmaker Lodewijk Zimmer. The main tower features an astronomical clock on a 14th-century tower wall with ten clock faces displaying zodiac signs, moon phases, tides, and other celestial information, making it one of the world's most complicated timepieces.
The Wonder Clock is a remarkable creation that took three years to build and was displayed at New York's 1935 World Fair, where it was called 'the outstanding wonder of the age' by the New York Museum of Science. It now stands in a small pavilion next to the Zimmer Tower and features 93 small dials and 14 automata showing global time zones, planetary movements, and tides from major ports worldwide.
Every hour, a mechanical show takes place on the side wall of the Zimmer Tower where crowds gather in the square to watch. An old man strikes a bell, red shutters flip open, and a series of historical portraits slowly slide into view, representing one hundred years of Belgian history.
The Wonder Clock contains an extraordinary range of hand speeds—the fastest clock hands complete a full rotation in just one-hundredth of a second, while the slowest hand takes an incredible 26,000 years to complete a single rotation. This extreme variation demonstrates the complexity and precision of Zimmer's mechanical engineering.
The clocks were designed and built by Lodewijk Zimmer, a local watchmaker and amateur astronomer from Lier, in the 1930s. He created three separate clocks: the astronomical clock on the 14th-century tower wall, the Wonder Clock (completed in 1935), and designed the hourly mechanical show that entertains visitors.