The first Night of Museums took place in Berlin in 1997, and the concept spread through Europe like wildfire: currently over 140 major European cities (and many minor ones) organise their own museum nights, during which the city's cultural institutions stay open late and most offer free admission. Many of Wrocław's museums also put together special events and programmes for the Night of Museums, so check the website to see what's taking place where. This is always a great opportunity to see the museums and experience the unique atmosphere that goes along with it.