Warsaw Castle Square hosted the annual concert "Solidarity with Belarus", which took place on March 30th, gathering Belarusian and Polish bands and musicians as well an impressive crowd. The concert and a demonstration before it marked the 90th anniversary of the proclamation of the People's Republic of Belarus. Organizers wanted to send a signal to the Belarusian opposition that Poland has not forgotten the aspirations of the Belarusian people. The event was organized also to remind Poles that not much has changed in Belarus and it is still not a free nation.