This superb museum and gallery features a worthy modern art exhibition - called Open Composition - courtesy of progressive artists from a number of countries, including Poland. You can also find two current temporary exhibitions, including "Masks of Time" on the work of Arthur Nacht-Samborski, a Polish artist who worked with the colorism technique. the other is the works of Andrew Lobodzinski from 1956 to 1972 -- one of the leading representatives of the Łódź neo-avant-garde movement. Here, you can find Poland's first sound sculpture, line and gun paintings, and DJ equipment he constructed with his own hands. 
Masks of Time will be available until February 18, and Lobodzinski's exhibit will be available until January 28. 
Fri enter for free at this museum.