Open Data on the museum collection

Collection data and images from the National Museum of Antiquities are freely available for reuse by developers under a Creative Commons license. Object descriptions (metadata) are available under a CC0 licence. The images (content) are made available under a CC BY licence. This entails that you are permitted to copy, adapt, distribute, or perform this material without permission from the National Museum of Antiquities. We would appreciate being mentioned as the source of the material. The correct citation form is: National Museum of Antiquities, Leiden. We would also love to hear about your uses of this material: stuur een e-mail.

API and OAI-PMH

There is an API available for live search requests, as well as access through OAI-PMH for synchronization of the entire database. Images can be provided in various formats.

  • Url for OAI-PMH:
    http://api.rmo.nl:17521/oai?verb=ListRecords&metadataPrefix=oai_dc
  • Sample URL for searching all fields:
    http://api.rmo.nl:17521/action=get&command=search&query=*%3Dmummie&range=1-10&fields=*
  • Sample URL for searching a specific field:
    http://api.rmo.nl:17521/action=get&command=search&query=Vindplaats%3DLeiden&range=1-10&fields=*
  • The data include URLs for thumbnail images. Here is a sample URL for a full-size image:
    http://img.rmo.nl/imageproxy/proxy.aspx?server=62.221.199.226&port=5297&filename=\005454.jpg

Available fields (as relevant, in Dutch):

Afdeling

Department of the museum

Afmetingenlabel

Dimensions of the object

Beschrijving

Description of the object

City

City name

Gemeente

Municipality

GeoString

Country, province

Inventarisnummer

Inventory number in the museum collection

Literatuur

References to this object in the professional literature

Locatie

Site where the object was found

Materiaal

Material(s) of which the object is made

Objectnaam

Type of object

Titel

Title of the object

Verwerving

How the museum acquired the object

Vindplaats

Complete record of site where the object was found

europeana_object

URL of thumbnail image

europeana_isShownBy

URL of medium-sized image

europeana_isShownAt

Deep link to the object on www.rmo.nl