Facts about Wall

The Berlin Wall went up in the early hours of August 13, 1961, and was constantly modified and reinforced until it fell 28 years later, having cost the lives of at least 136 people who tried to cross it.
The total length was 155 kilometres (96 miles), of which 43 kilometres ran roughly north-south, cleaving Berlin in two, while another 112 kilometres isolated the enclave of West Berlin from the surrounding East German state.
A "no-man's land" ran the length of the Wall, varying from the width of a street to about 300 metres (328 yards), effectively blighting the immediate terrain around for normal human use.