Hamburg Hauptbahnhof is the main railway station of the city of Hamburg, Germany and is classed by Deutsche Bahn as a category 1 railway station. Opened in 1906 to replace 4 separate terminal stations, today Hamburg Hauptbahnhof is operated by DB Station&Service AG. With an average of 550,000 passengers a day, it is Germany's busiest railway station and the second-busiest in Europe after the Gare du Nord in Paris.