Accession number (cultural property)

For other uses, see Accession number.
Label in a gallery indicating the object's accession number.

In libraries, art galleries, museums and archives, an accession number is a unique identifier assigned to, and achieving initial control of, each acquisition. Assignment of accession numbers typically occurs at the point of accessioning or cataloging.

If an item is removed from the collection, its number is usually not reused for new items.