The new building of the German National Library in Frankfurt opened in 1997.
Notes on verification
Confirmed by DNB's official site and multiple independent sources (buchmarkt.de, architecture database, personal blog) all agreeing on the 1997 opening date, with precise date of May 14, 1997 corroborated across sources.
Sources
- Nicht nur Bücher – Kunst am Bau und mehr 2 (blog.dnb.de)
- https://buchmarkt.de/2017/05/06/deutsche-nationalbibliothek-frankfurt-kunst-und-buecher/ (buchmarkt.de)
- https://www.museum-der-1000-orte.de/bauwerke/bauwerk/deutsche-nationalbibliothek (museum-der-1000-orte.de)
- https://www.buch-lady.de/2019/11/deutsche-nationalbibliothek-frankfurt.html (buch-lady.de)