Historical reference: Do not rely on this information. It is very old. About this collection
Grolier, Jean (1479-1565), was a noted French book-collector. He accompanied the army of Francis to Italy, and did diplomatic service at Milan and Rome. His library, which was scattered about the middle of the 17th century, numbered about 3,000 well-chosen books, bound in the special style known by his name, and some 350 of these have been recovered.