By Steve Rosenberg
BBC News, Berlin
Carl Wolfgang Holzapfel will re-enact his incarceration
A former victim of East Germany's secret police, the Stasi, is due to return to the Berlin prison he was once locked up in - for an art project.
Carl-Wolfgang Holzapfel was arrested by the police in the 1960s while at a demonstration in East Berlin.
He spent nine months in a secret Stasi prison, where he was abused and tortured.
He plans to spend seven days living in the small cell with all his movements broadcast live on the internet.
In October 1965 Carl-Wolfgang Holzapfel disappeared.
He had been demonstrating in East Berlin against the arrest of political prisoners when he suddenly become one himself.
Now the 65-year-old is returning to his former jail - the Hohenschoenhausen - in Berlin to re-enact his incarceration.
He will 'imprison' himself for seven days in a small cell - video cameras will film him round-the-clock and there will be live streaming of his imprisonment on the internet.
But not - he says - to provide entertainment.
"With this art project we want to show the role the Resistance played in bringing down the wall. Each one of the 250,000 political prisoners in East Germany played a part in that day - 9 November 1989.
"We want to reflect, too, the dramas that took place during 40 years of the German Democratic Republic."
One of the organisers of the project is German artist Franziska Vu.
She believes it is important to show the young generation the kind of repression that occurred in East Germany - to ensure it is never repeated.
It is one of a number of events happening in Germany to mark the 20th anniversary of the fall of the Berlin Wall.