The Euro Tower, Eurotower, is one of the landmarks of Frankfurt. The 40-story skyscraper (39th and 5th floor basements) is located in the Bank District of Frankfurt, Hesse, Kaiserstrae 29. The skyscraper was completed in 1977 and was used as the headquarters of the European Monetary Authority, the predecessor of the European Central Bank. The European Central Bank was established in 1998 and the skyscraper is one of the office buildings; on March 18, 2015, the European Central Bank moved to the newly built twin skyscrapers (Frankfurt Ruckertstrasse). The European Central Bank was established under the Maastricht Treaty of 1992, also known as the Treaty of the European Union, including the Treaty of Economic and Monetary Union and the Treaty of Political Union. The establishment of the European Central Bank in Frankfurt illustrates the importance of Frankfurt in Europe. Frankfurt is an important industrial, commercial, financial and transportation center in Germany and even Europe, 20 of the 100 largest industrial enterprises in Germany are headquartered in Frankfurt, and the Bundesbank (Bundesbank) is in the center of Frankfurt. Frankfurt is on the banks of the Main River, which connects the Rhine and Danube via canal, leading to the North and Black Seas; Frankfurt is Germany's largest aviation hub, Frankfurt International Airport (FRA) is the third largest airport in Europe and the main base for Lufthansa. For tourists, perhaps the Euro sign will be striking, after all, walking through the skyscrapers, as if lost in the urban forest. Several times, only one night, near the sign. Suddenly remembered these words: the flower can't sleep, because the wind is there, it will get up and spit fragrant... distance, it is difficult to determine, maybe a morning breeze a flower for another life, far away to see the city forest... Enjoy the flowers carefully, and then say: the wind is very fragrant!