Abstract. Integrated digital access to multiple collections is a prominent issue for many Cultural Heritage institutions. Metadata describing diverse collections must be interoperable to achieve integrated access. Aligning the controlled vocabularies that are used to annotate objects in different Cultural Heritage collections could provide such interoperability. In this paper, we present an experiment where we apply Semantic Web techniques to match the vocabularies of two collections. We discuss the steps that are required for such matching, namely formalizing the initial resources using Semantic Web languages, and running ontology mapping tools on the resulting representations. In addition, we present a prototype that enables one to browse the two collections using the obtained alignment while still providing the user with the original vocabulary structures.