History of Cologne was considered a substitute for the German University of Strasbourg, which became part of France along with the rest of Alsace. Cologne prospered during the Weimar Republic and progress was made especially in governance, city planning and social affairs. Social housing projects were considered exemplary and were copied by other German cities. As Cologne competed to host the Olympics, a modern sports stadium was erected at Müngersdorf. Beginning of the 1920s civil aviation was permitted once more, and Cologne Butzweilerhof Airport soon became a hub for national and international air traffic, second in Germany only to Berlin Tempelhof Airport. At
Cologne I and Neustadt-Nord. The latter area includes about half of Cologne's old and new town areas. The following table does not list parties which did not contest or gain constituency votes. Cologne I Cologne I () is one of the four electoral districts (German: "Wahlkreis") covering the city of Cologne in the German Bundestag. Part of the state of North Rhine-Westphalia, the constituency elects one representative under the mixed member proportional representation (MMP) system. Under the current constituency numbering system, it is designated as constituency 94. Covering the south eastern quarter of the city of Cologne, the constituency contains the entirety