After a trial phase in 1975, the construction begins of the 4th generation of the Berlin Wall (Grenzmauer-75 [Border Wall – 75]). It consists of industrially produced vertical wall elements with an asbestos pipe on the top.
The regime critic and physicist Andrei D. Sakharov and his wife Yelena Bonner are arrested in the western Siberian city of Omsk. Sakharov is the leading figure in the civil and human rights movement in the USSR. He was awarded the Nobel Peace prize in 1975 for his commitment in helping politically and religiously persecuted people.
The "Palace of the Republic" is opened on the grounds of the former Berlin City Palace in Marx-Engels Square in East Berlin. The building is intended among other things as the seat of the GDR Volkskammer.