Night of Museums is the only such a night of the year! In many Polish cities there will be a lot to do.
The Night of Museums in May is one of most popular cultural events in Poland as museums, galleries and other arts institutions stay open late into the night. Additional attractions include music concerts, writer's workshops, film screenings and street theatre.
If you prefer to watch exhibitions in peace you will have no chance :) Museums are crowded but the unique atmosphere counts! If the weather is good people just enjoy walking in the city center.
That night we should not sleep :)