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
History of the Jews in Cologne area of the Cologne Rathaus in 1953 two fully conserved tombstones were found on the northwest corner of the building in a large bomb crater. They probably came from the Jewish cemetery of Judenbüchel and were used as building material. The inscription of the tombstone of Rachel said: The few Jews who remained in the city, began to re-establish a community in right-Rhenish Deutz, whose rabbi called himself later "Country Rabbi of Cologne" ("Landesrabbiner"). Rabbi Vives was known by this title during the mid-15th century. In 1634, there were 17 Jews in Deutz, in 1659 there were 24 houses inhabited