Version 0.1 of the ArCo knowledge graph contains the ontology network and the data about the cultural properties catalogued by the Italian Institute of the General Catalogue and Documentation. Data are represented with RDF and by using N-Triples as syntax. The ontologies of the network are modelled with OWL 2 and serialised with the RDF/XML syntax. The ontology network is released along with alignments to other ontologies/vocabularies in the Semantic Web. Those alignments are provided within separate OWL files. The data are contained into a single RDF dump serialised as N-TRIPLES. Additionally, the release provides the links between ArCO entities and other entities published in other datasets in the Linked Open Data cloud. Such links are represented by using owl:sameAs axioms and serialised as N-TRIPLES into a separate file.