Starting in 1852 in the South of Düsseldorf there was a growth of factories during the Industrial Revolution. Düsseldorf grew to the south and the traditionally industrial centres of the city are still there today. In 1893 the "Hammer Eisenbahnbrücke" - a railway bridge across the river Rhine - was finished. Bilk got its own railway station, which today is only a station for regional trains. The Bilk Observatory was founded in 1843 and destroyed by bombing in 1943. In 1852 24 asteroids were found there, called "the 24 Düsseldorf planets".