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Due to 450th anniversary of foundation of the Academic Gymnasium at Gdansk, Poland since 1945, which is on 13 June 2008, the National Museum in Gdańsk unveiled a memorial table dedicated to it and its contributions as part of Polish scholary and educational system.
Janowski was also co-editor of the Polish edition of Donald Kuspit's book The End of Art, which accompanied the art exhibition New Old Masters in National Museum in Gdańsk in 2006.
From 1870-1873 he was one of creators of the City Museum (now, National Museum in Gdańsk).