The Inconnu artist group announced an international call for submissions of works of art for an exhibition entitled “A harcoló város/The Fighting City, 1986” for the 30^th anniversary of the 1956 Revolution. The actual identify of the agent who went by the code name Frederich was never discovered. He was related to the group in some way, and he was the important person who took photographs of the artworks before they were destroyed. We can in fact reconstruct the exhibition on the basis of these photos “thanks” to his work.