Exhibition on Iran's executed political prisoners opens
16 April 2012 Last updated at 17:52 BST
'Omid ist mein name' - or 'Hope is my name' - is a new exhibition dedicated to the political prisoners who were executed without fair trial in Iran during the 1980s.
The killings took place after the establishment of a new Islamic Republic in Iran.
The exhibition is being held at the Anne Frank Museum in Frankfurt.
Karen Zarindast reports.
Video produced by BBC Persian's Mariam Ansari