Wikidata is Wikipedia's sister database project, which is a large multilingual knowledge base that anyone can edit. It contains over 24 million data entities and 150,000 contributors. Data is stored per entity as property-value assignments, and can have annotations and references. Wikidata serves as a cultural heritage information hub, containing data on over 700,000 entities with heritage status. It has strong connections to Wikipedias, cultural heritage databases, and external data sources. New users are encouraged to connect their data to Wikidata by joining ongoing integration projects, donating data, and finding ways to exploit Wikidata content and infrastructure.