The oldest planetarium in the world is located on the ceiling of the living room of a beautiful canal house in Franeker. This accurately moving model of the solar system was built between 1774 and 1781 by the Frisian cloud hammer Eise Eisinga. The Planetarium room and the impressive gear form the oldest planetarium in the world that still works. But there is more to see! The former cloud farm of Eisinga, astronomical instruments, a cinema, changing exhibitions and attention to modern astronomy.