Geography and urban development of Dresden past 60 years has made Dresden the fourth largest urban area in Germany after Berlin, Hamburg, and Cologne. The most important river in Dresden is the Elbe river, the only navigable body of water to flow through the city. There are also a number of tributaries such as the river Weißeritz. The nearest German cities are Chemnitz (80 km to the southwest), Leipzig (100 km to the northwest) and Berlin (200 km to the north). The Czech capital Prague is about 150 km to the south; the Polish city of Wrocław is about 200 km to the east. There are
Dresden Saxon monarchs, which is why the outskirts are often named after sovereigns. From the 19th century the city grew by incorporating other districts. Dresden has been divided into ten districts called "Ortsamtsbereich" and nine former boroughs ("Ortschaften") which have been incorporated. The population of Dresden grew to 100,000 inhabitants in 1852, making it one of the first German cities after Hamburg and Berlin to reach that number. The population peaked at 649,252 in 1933, and dropped to 450,000 in 1946 because of World War II, during which large residential areas of the city were destroyed. After large incorporations and city