Kassel, GERMANY

Kassel is a city in the centre of Germany. It makes military weapons so during World War Two, British planes bombed Kassel. In one night, 80% of houses were destroyed. Today, the architecture is mostly from the 1950s. Every five years, Kassel holds the Documenta, a big festival of contemporary art. And every five years, artists complain that Kassel is still making weapons.