the northeast side and one on the southwest side. During the restructuring of the rail tracks in the Cologne area in about 1905–1911 (most notable for the construction of the new South Bridge and the four-track Hohenzollern Bridge), the waiting room building was removed and all the platforms were rebuilt as through platforms. Advantage was taken of the previously unused space beneath the tracks. Only the first and second class waiting rooms in Trankgasse and Johannisstraße (streets) survived World War II and subsequent modifications and are now used as a restaurant and the Alter Wartesaal events centre. Reconstruction and new construction For several years after World War II, there was debate as to whether the main station should be rebuilt on the site of the Gereon freight yard—now the site of MediaPark. Therefore, the reconstruction of the main railway station was a slow process and for a decade Cologne station included temporary structures. The first building occurred in 1953 with the demolition of the long building on the western side, which was replaced by a modern building with baggage handling facilities and a hotel. The old station building (which had been only slightly damaged during the war and temporarily repaired) was demolished in 1955. On 23 September 1957, the new station hall with its shell-shaped roof was opened to the design of the architects Schmitt and Schneider. The main station building was built on the northern side of the station following the demolition of an originally built-up area between the streets of Maximinenstraße, Domstraße, Hofergasse and Hermannstraße and the shifting of Goldgasse with the building of Breslauer Platz as a second entrance plaza. In the course of building the S-Bahn up until 1991, the entire railway line, railway station and the Hohenzollern bridge were supplemented by two independent S-Bahn tracks. First, in 1975 two additional platforms were built (10 and 11) and then the additional tracks were built on the Hohenzollern bridge for the S-Bahn line. In 2000, a shopping centre was opened at the entry level—including the area under the S-Bahn tracks. The so-called colonnade includes 70 shops and restaurants with over 11,500 square metres of retail space and 700 employees. Planning At a summit of Deutsche Bahn, the federal government and the state of North Rhine-Westphalia on 31 March 2010 in Düsseldorf, it was decided that the station should be extended by 2019 with an S-Bahn platform with