On April 18 and May 18, the Days of Moscow historical heritage, you can visit any museums and art galleries of Moscow for free. Entrance to around 250 cultural objects will be free, including the Kremlin Palace in the Moscow Kremlin.
These days have been timed to the 150th anniversary of the foundation of the Tretyakov State Gallery, says Chairman of the Moscow Culture Committee Sergei Khudyakov. He also mentions that about 1 250 public events are to take place in the framework of these holidays.
Source: www.utro.ru