The aim of this paper is to present the complexity of information management in cultural heritage domain on the basis of real-life examples of distributed research infrastructures for the arts and humanities. The digitisation of cultural heritage artefacts is a process that is ongoing for many years in institutions all over the world and generates increasing amount of digital information. This generates challenges on the level of particular institutions which are holding heritage collections, but also on the national and international level, where such information is combined to provide end users unified access to distributed heritage datasets. The paper presents the flow of cultural heritage information from the level of a single institution up to pan-European data platform Europeana.eu via the level of regional and national cultural heritage data services. It is based on experiences of Poznań Supercomputing and Networking Center collected during the last 15+ years of involvement in the development of cultural heritage network services on all these levels.