Nomenclator of Leiden University Library appears, the first printed catalog of an institutional library.

A nomenclator, in classical times, referred to a slave whose duty was to recall the names of persons his master met during a political campaign. Later, the scope was expanded to include names of people in any social context and also other socially important information about them.

Leiden University Libraries is the set of libraries of Leiden University, founded in 1575 in Leiden, Netherlands. Holdings include some five million volumes, one million e-books, ninety thousand e-journals, two thousand current paper journals, and three thousand cuneiform tablets. The library manages large collections on Indonesia and the Caribbean, and curates seven entries in UNESCO's international and Dutch Memory of the World Register. Joseph Justus Scaliger, who was a languages and history professor at Leiden from 1593 up to 1609, commented in Latin on the library:

"Est hic magna commoditas bibliothecae ut studiosi possint studere"

—Josephus Justus Scaliger

"Here [at Leiden] is the great convenience of a library so that those who want to study [students], can study."