Berlin Ostbahnhof (German for Berlin East railway station) is a main line railway station in Berlin, Germany. It is located in the Friedrichshain quarter, now part of Friedrichshain-Kreuzberg borough, and has undergone several name changes in its history. It was known as Berlin Hauptbahnhof from 1987 to 1998, a name now applied to Berlin's new central station at the former Lehrter station. Alongside Berlin Zoologischer Garten station it was one of the city's two main stations; however, it has declined in significance since the opening of the new Hauptbahnhof on 26 May 2006, and many mainline trains have been re-routed on the North–South mainline through the new Tiergarten tunnel, bypassing Ostbahnhof.