In the page's words:

The Long Night of Museums Bremen invites you on a journey through the cultural diversity of the city on May 24, 2025. Culture enthusiasts can discover 31 museums and exhibition venues from 6 pm to midnight with just one ticket.
In the unique atmosphere of museums by night, a varied program invites you to enjoy culture: Glimpses behind the scenes, music and dance in unusual places, entertaining guided tours, plays with the bremer shakespeare company, hands-on activities and much more.