The four German cities of Berlin, Frankfurt, Friedrichshafen and Hamburg each offer a unique and diverse architectural landscape. Berlin is known for its mix of modern and historical architecture, with iconic landmarks such as the Brandenburg Gate and the Reichstag building. Frankfurt is a hub of modern architecture, with skyscrapers such as the Commerzbank Tower and Messeturm defining the city's skyline. Hamburg, on the other hand, is known for its elaborate Kontorhäuser. Finally, Friedrichshafen's landmark is the Zeppelin Museum, showcasing the city's rich heritage in the airspace and car industries. Each photo series explores one of these city and its history in detail.