From textbooks to historical classics, world maps, and Bibles: throughout the centuries, we have several contributors to thank for such a diverse library, all motivated by their own purposes. Christophe Plantin initially purchased books to support his proofreaders and to use the texts in printed editions. His grandson, Balthasar I Moretus, was fond of classical authors and works on antiquity. Subsequent owners of the printing house further developed the library as a centre of knowledge for scholars such as Nicolas Heinsius and Franciscus Junius.
Once the museum was established, the library continued to expand. The original curator, Max Rooses, filled out the Plantin and Moretus works with missing editions and 16th-century material from other Antwerp printers and publishing houses. Through a careful acquisition policy, the library now holds the most complete collection of prints coming off the presses at the Officina Plantiniana.