Otto von Bismarck was declared an honorary citizen of Cologne in 1875. In 1902 this Bismarck Tower was built. It depicts Bismarck as Roland, the knight who signifies the town privileges. It is also known as Die Wacht am Rhein, or The Guard on the Rhine, after a popular song of the day. Originally there was little vegetation around the monument, but now trees have obscured it. It is not mentioned on the website of the city of Cologne either.