He became widely known when he was sentenced to 18 months of prison for the alleged disclosure of classified information, treason and espionage. In fact, von Ossietzky’s publication drew the public’s attention to the rearmament of the Reich’s airforce in breach of the Treaty of Versailles.
He was later released from prison after receiving amnesty in 1932. After NSDAP took the power, on February 28, 1933, Carl von Ossietzky was arrested and imprisoned in Esterwegen concentration camp. He spent the rest of his life in different prisons and concentration camps.
The government of the Third Reich did not grant him permission to receive the peace Prize in person in Oslo. Moreover, the press was prohibited to write reports about the prize for Ossietzky. The Laureate died of TB in a prison hospital in Berlin.