This year’s edition of the Night of Museums , a well-established event during which museums open their doors to visitors for free, will take place this year on Saturday, May 23, between 18:00 and 02:00, bringing together over 300 museums from all 39 counties of the country. The list may change and can be checked on the official website . This year’s edition offers an extended program intended for all categories of visitors and reconfirms the scale of the cultural project dedicated to promoting heritage.