Although completed in 1914, this building has only housed what is Europe's biggest planetarium since 1930. An almost-perfect reproduction of the night sky and its stars is projected onto the interior of the copper-domed roof. The instruments here are actually some of the most versatile and complicated in the world, and can depict stars that can be seen from all countries and at all points in time. The Planetarium also has an extensive program of special events, lectures and special screenings. The regular shows take place on Sundays, Wednesdays and Fridays. There is also a permanent exhibition which shows antique star charts, measuring instruments, telescopes, models of planets and satellites and the like.