History of Cologne (Cologne Tower), one of Cologne's most prominent highrises. Secondly, a permanent improvement in traffic infrastructure, which makes Cologne one of the most easily accessible metropolitan areas in Central Europe. Due to the economic success of the Cologne Trade Fair, the city arranged a large extension to the fair site in 2005. The original buildings, which date back to the 1920s, are rented out to RTL, Germany's largest private broadcaster, as their new corporate headquarters. A controversy started after Muslims in Cologne sought to build a mosque. Most important for the history of Cologne since the Middle Ages is the Cologne
Historical Archive of the City of Cologne municipal archive and library was erected between 1894 and 1897 to a Gothic revival design by Friedrich Carl Heimann: it was inaugurated in December 1897. The new building was large enough to accommodate the archive at a time of accelerated growth when the city of Cologne was absorbing many previously independent towns and villages. During World War II the building suffered damage from bombing. However, since all records and manuscripts had been moved into secure storage from as early as September 1939, the archive did not suffer any substantial loss. Since the archive moved to its new location in 1971,