Maciej Klich (Mattias Jan-Maria) (born February 28, 1958, in Kraków.) is a Polish historian, graphic artist, and a former anti-communist Polish independence diaspora activist. In 1980, Klich co-founded the Independent Students' Association in Silesia. Klich was interned from December 24, 1981, during the martial law set by the communist regime in Poland. In interment camps, Klich created 70+ stamps for the so-called "camp mail". Klich was released on July 23, 1982. After his release, Klich participated in the underground Solidarity and the underground Independent Students' Association (Polish: Niezależne Zrzeszenie Studentów, NZS). In 1984, Klich forcefully immigrated to Sweden (Stockholm) due to a "forced migration" set by the communist regime in Poland. After immigrating to Sweden, Klich