Eise Eisinga’s mechanical planetarium is built into the timber roof of the living room ceiling of his historic canal house.

Other parts on permanent display are Eisinga’s former wool combing establishments and a collection of historical astronomical instruments.

Those instruments in the collection include Georgian telescopes, 18th century octants and a tellurium, an educational model of the Sun, Earth and Moon.

[4] The museum has a Planetarium Café and Brasserie De Stadstuin located in the former Van Balen coffee-roasting house.

[6] The orrery was nominated 12 December 2011 by the Dutch government for UNESCO World Heritage status, based on its long history as a working planetarium open to the public and its continued efforts to preserve its heritage.

[7] In December 2018, it was announced that the Dutch minister of Education, Culture and Science will be sending an application to UNESCO to request a formal nomination of the orrery, bringing heritage status one step closer.

The pendulum, for instance, is made of a single type of metal so it is influenced by temperature fluctuations.