Eisinga Planetarium in Franeker

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A Journey Through Time: The Eisinga Planetarium in Franeker

The Eisinga Planetarium in Franeker, located in the province of Friesland, Netherlands, stands as a testament to human curiosity and ingenuity. This unique astronomical marvel, inscribed as a UNESCO World Heritage Site in 2023, offers a captivating glimpse into the past, providing visitors with an opportunity to witness the celestial movements as they were understood during the 18th century.

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UNESCO Description of the World Heritage Site

Built between 1774 and 1781, this property is a moving mechanical scale model of the solar system as it was known at the time. Conceived and built by an ordinary citizen – the wool manufacturer Eise Eisinga – the model is built into the ceiling and south wall of the former living room/bedroom of its creator. Powered by one single pendulum clock, it provides a realistic image of the positions of the Sun, the Moon, the Earth and five other planets (Mercury, Venus, Mars, Jupiter and Saturn). The planets revolve around the Sun in real time and the distance between the planets is at scale. The model fills the entire ceiling of the room, making it one of the earliest predecessors of the ceiling and projection planetariums of the 20th and 21st centuries.

UNESCO Justification of the World Heritage Site

Criterion (iv): The Koninklijk Eise Eisinga Planetarium (Royal Eise Eisinga Planetarium) is an outstanding example of an 18th-century orrery, representing exceptional creativity in its technical design and execution. The orrery provides an up-to-date and realistic image of the positions of the Sun, the Moon, the Earth and the five other planets that were known at the time. The planetarium mechanism is ingeniously attached to the original beam construction of the house, which was specially adapted for this purpose. In operation almost continuously since 1781, it consists of simple but robust components, such as wooden hoops and discs, and iron pins. As a technological ensemble, it continues to contribute to the dissemination of astronomical knowledge, and in particular to the understanding of the heliocentric model of the Universe. The property is also associated with the transfer of scientific knowledge to a wider audience in 18th-century society.

Encyclopedia Record: Eise Eisinga Planetarium

The Royal Eise Eisinga Planetarium is an 18th-century orrery in Franeker, Friesland, Netherlands. It is currently a museum and open to the public. The orrery has been on the top 100 Dutch heritage sites list since 1990. In September 2023, it received the status of UNESCO World Heritage Site. It is the oldest working orrery in the world.

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