| 1 | The Berlin Wall collapses. The German Democratic Republic opens its borders. | |
| 2 | Much to the consternation of the GDR, they too were granted asylum in West Berlin. | |
| 3 | Once a Western island in the German Democratic Republic, after unification of the two Germanys, Berlin became the most interesting and cosmopolitan city in all of Europe. | |
| 4 | Re- building the infrastructure and modernizing the industry of former German Democratic Republic required everybody's effort. | |
| 5 | The 3.5 million East Germans who had left since the founding of the GDR in 1949 made up about 20% of the entire East German population. |