The presentation will introduce the motivations, architecture, and operation of the OpenAIRE Research Graph (http://graph.openaire.eu), one of the largest (if not the largest) public, open access, CRIS-like collections of metadata and semantic links (~1Bi) between research-related entities, such as articles, datasets, software, and other research products, and entities like organizations, funders, funding streams, projects, research communities, and data sources. The Graph data is Open Access, accessible via APIs and data dumps in Zenodo.org. The data includes provenance of all its information (collected metadata and inferred via machinery), it is complete (includes all major and minor data sources worldwide, up to 99K including journals), and it is deduplicated ('records describing the same object are merged onto one representative object').