The Elbe river flows through the Port of Hamburg, which is the third-largest port in Europe. With a population of approximately 1.8 million people, it is the second-largest city in Germany and eighth largest city in the European Union. Hamburg has a total area of 755 km2 (292 sq mi).
The DESY (Deutsches Elektronen Synchrotron, "German Electron Synchrotron") is the biggest German research center for particle physics, with sites in Hamburg and Zeuthen. DESY was founded on 18 December 1959 in Hamburg by means of a treaty signed by the federal minister for atomic energy Siegfried Balke and Hamburg's mayor Max Brauer.