# Authority Data

Census records have been partially linked to identifers from the following indices:

[VIAF](https://viaf.org/) – Virtual International Authority File

[GND](https://www.dnb.de/DE/Professionell/Standardisierung/GND/gnd_node.html) – Gemeinsame Normdatei, Deutsche Nationalbibliothek

[iDAI gazetteer](https://gazetteer.dainst.org/app/#!/home) – Place names defined by the Deutsches Archäologisches Institut

[Pleiades](https://pleiades.stoa.org/) – Place names defined by the Pleiades gazetteer

[TGN](https://www.census.de/en/database/database_help/\(http://getty.edu/research/tools/vocabularies/tgn/index.html) – Getty Thesaurus of Geographic Names

[ULAN](http://getty.edu/research/tools/vocabularies/ulan/index.) – Getty Union List of Artist Names

[Geonomes](https://www.geonames.org/) — Geographical database

[Wikidata](https://www.wikidata.org/wiki/Wikidata:Main_Page) – Open knowledge base

These identifiers have been linked to records in the Object Types Antique Monuments, Postclassical Works, and Locations.