Aequatorial-Sonnenuhr Sculpture

Can shadows speak? At the Aequatorial-Sonnenuhr, they certainly do. This isn’t just a sculpture. It’s a conversation between Earth and sky, a timepiece that whispers tales of distant cities and the dance of our planet around the sun. The Aequatorial-Sonnenuhr, sometimes called the Kupferuhr (Copper Clock), arrived here in 2004. But its story begins much earlier, in the late 1940s, in the mind of engineer and clockmaker Lothar M. Loske. He envisioned a sundial that could also tell the time around the world. His vision took shape thanks to the Vereinigte Deutsche Metallwerke, who crafted this intricate 3.6-meter copper marvel, weighing a hefty 1,000 kilograms. Imagine the skill and precision involved in creating this armillary sphere. A central rod, the Polstab, stretches between the celestial poles, casting its shadow onto the Aequatorial-Sonnenuhr’s broad equatorial band. This band holds twelve scales, one for each month, carefully calibrated to account for the equation of time and display Central European Time. Look closely, and you’ll find Roman numerals marking true local time. Now, notice the thinner ring parallel to the main band. This is the world time ring, inscribed with the names of 200 cities. This ring is rotatable around the Polstab. By turning the ring from Frankfurt’s position to another city, the inner surface displays the time in that chosen location. You can even see both true local time and zone time. The Aequatorial-Sonnenuhr’s journey wasn’t always smooth. It was originally placed in the Nizza park in 1951. Over time, the trees grew tall, overshadowing the sundial. So, in 2004, after careful restoration, it was moved 1.4 kilometers east to its current location, perched atop a new stone pedestal. A small step, once part of the original base, is now gone. This step held a rolled-up dedication document. It is now safely stored in Frankfurt’s Institute for Urban History. The Aequatorial-Sonnenuhr stands as a testament to ingenuity, a symbol of our connection to the cosmos, and a beautiful reminder that time, like a shadow, is always in motion.