Kulturhaus Würth is home to Carmen Würth's reference library, which is open to the public free of charge under the name Bibliothek Frau Holle. Over 10,000 books, from non-fiction and children's books to world literature and fiction, are presented on two levels. Opened in 2017, the building was built especially for this purpose and uniquely designed with great attention to detail, using the highest quality materials and murals. Guests are surrounded by an unmistakable atmosphere that transports them into the world of books as soon as they enter the building.

The Holle library is also a branch of the registry office. Weddings can be held here free of charge subject to availability and consultation.