I hadn't heard about that. Months After Cyberattack, British Library Crawls Back Online
Britain’s national library made the first major steps in its recovery process after a ransomware group took down its website and online catalog.

There is a paywall at the NY Times, but here is part of it:

A criminal group attacked Britain’s national library in late October, disrupting online systems, including email, and stealing data, which the group later tried to auction online, the library said. Mr. Keating apologized for not being able to protect some personal data belonging to users and staff members that was leaked in the attacks.

Cyberattacks targeting arts and cultural institutions are becoming more common. Late last year, the Museum of Fine Arts Boston, the Rubin Museum of Art in New York and the Crystal Bridges Museum of American Art in Arkansas were among the institutions that experienced outages after a cyberattack. The attack targeted a service provider, Gallery Systems, used by hundreds of cultural organizations to display their work online.

The Metropolitan Opera in 2022 was hobbled by a cyberattack that took its website offline and paralyzed its box office. Last year, a cyberattack was carried out on the Philadelphia Orchestra and its home venue, the Kimmel Center.

Good idea to take themselves out of harm's way.