and Gesundbrunnen. Bernau and Helligensee service were merged into Helligensee and Waidmannlust - Lichterfelde and Lichtenrade services, because Bornholmer Straße was also closed due to the Berlin Wall construction. Because of the strike, Lichtenrade – Frohnau and Lichterfelde Süd – Heiligensee were the only ones left from 1980 to 1984. And it was replaced, although it remains the same for Lichtenrade to Frohnau, and Anhalter Bahnhof to Wannsee until the German reunification in 1990. Fall of the Berlin Wall After German reunification in 1990, Gesundbrunnen was rebuilt extensively - it did delay the reopening of the rapid transit link to Berlin Schönhauser Allee station until 17 September 2001. The last stretch, from Westhafen to Gesundbrunnen was reopened on 15 June 2002. In the Pilzkonzept master plan the station was modernized as Berlin's northern long-distance train station and during 2005 there were discussions to rename the station to Nordkreuz (North Cross) reflecting the names of the other connection stations on the Ringbahn namely Ostkreuz (East Cross), Südkreuz (South Cross) and Westkreuz (West Cross). Work on the railway hub was completed on 26 May 2006, with no development on the rename until 2016, when Nordkreuz was appended to Gesundbrunnen as an official alternative name. Despite its station category 1 the station had no representative entrance building - the old entrance building had been demolished and it had never been replaced giving the new station a peculiar appearance. The area designated for the entrance building was left as a public open space (Hanne-Sobek-Platz). The planning was stopped not only by financial cuts but also due to the existence of the nearby Gesundbrunnen-Center shopping center that was opened in 1997 offering 25000 square meters of shopping facilities plus a direct connection to the railway station. The planning resumed during 2010 and construction work on a new entrance building began by the end of 2011, with the 3300 square meters projected to cost a total of 7.4 million euros. The new entrance building opened in autumn 2015. Train services National and Regional services The station is served by the following service(s): Intercity Express services (ICE 10) (Bonn -) Köln - Wuppertal - Hamm - Hannover - Berlin Intercity Express services (ICE 10) (Köln/Bonn Airport -) Düsseldorf - Essen - Dortmund - Hamm - Hannover - Berlin Intercity-Express service (ICE 28) (Stralsund - Eberswalde -) Berlin - Halle - Jena - Nuremberg - Munich Intercity-Express service