The latter expanded it and combined it with adjacent hôtels, creating the Palais Mazarin, which in 1721 became the Bibliothèque du Roi (King's Library).

[2] The Hôtel Tubeuf is now part of the complex of buildings forming the Richelieu site of the Bibliothèque nationale de France[2] and was declared a monument historique in 1983.

[4] The Hôtel Tubeuf is one of the last and most splendid examples in Paris of brick-and-stone architecture (popular in France in the early 17th century).

[2] The building reflects the architect's fondness for elaborate rustication, stone chaines and quoins, and uncommonly shaped pediments decorated in low-relief.

[7] The Hôtel Tubeuf now hosts the departments of prints and photographs (Département des estampes et de la photographie) and of maps and plans (Département des cartes et plans) of the French National Library.