The orrery was built to prove that the planets would not collide, addressing public panic caused by a rare conjunction of celestial bodies.
The mechanism is powered by a massive weight-driven clock located in the crawl space above the living room ceiling.
It is the oldest functional planetarium in existence, pre-dating modern digital technology by two centuries.
Eisinga painted the planets and their orbits directly onto the wooden ceiling of his living room.
The planetary gears were hand-forged using wood and iron by Eisinga himself.
It remains the only private house in the world to double as a fully functional, long-term scientific observatory.
The Sun is represented by a golden ball in the center, and the background is painted in a distinctive Prussian blue.
The Eise Eisinga Planetarium is the oldest working orrery in the world, housed within the original 18th-century living room of its creator. Built between 1774 and 1781, the mechanical model of the solar system is powered by a pendulum clock and nine weights integrated into the ceiling. It features hand-painted planetary movements that accurately reflect their actual orbital periods. In 2023, the site was officially designated as a UNESCO World Heritage site. Visitors view the mechanism from the original parlor where Eise Eisinga, a wool comber and amateur astronomer, lived and worked. The museum complex also includes a modern visitor center detailing the history of the construction and the life of Eisinga. The model remains accurate to its original calibration, displaying the six planets known at the time of its creation. It is located in the historic center of Franeker, Friesland.
Directly beneath the central ceiling display in the main parlor.
Read the history of the planetarium before entering, as the live demonstration focuses on the mechanics.
Visit the upstairs room to see the intricate gear system exposed.
Plan your visit to coincide with a guided demonstration to see the mechanism in motion.
Assuming it is a modern digital planetarium; this is a purely mechanical, historical device.
Closed on Mondays. Closed on January 1st, December 25th, and King's Day.
Maintain silence during demonstrations; do not touch the historic ceiling or exposed mechanical parts.
