La Poste will issue a one-stamp sheet and philatelic souvenir on 9 November 2026 for thirty years of the Bibliothèque nationale de France’s François-Mitterrand site. Elsa Catelin created, engraved and laid out the €3.10 stamp using a photograph by Élie Ludwig.

The sheet combines offset and intaglio printing, with glossy varnish on selected architectural elements. The stamp measures 40.85 × 30 mm and the sheet 120 × 90 mm. The announced quantity is 330,000, with the denomination paying Lettre verte postage up to 100 grams.

A separate €5 souvenir, limited to 20,000, contains a one-stamp sheetlet. Its sheetlet uses photogravure and its card offset printing. Advance sales for both products are scheduled at the Paris Autumn Philatelic Salon on 5–7 November.

Opened to the public in 1996, the library site was designed by Dominique Perrault. Its four eighty-metre towers resemble open books and surround a one-hectare forest garden. The issue shows the towers and their façades.