This webinar introduces the methodology followed by the Greek National Aggregator SearchCulture.gr for its data enrichment processes. Aggregators deal with a mass of heterogeneous data coming from multiple cultural heritage institutions. In the process of cleaning, harmonising, enriching and organising data, they follow different strategies. How this data is handled by each institution, plays a decisive role on the (multilingual) search and discovery functions they can offer to their users. This webinar explores the methodology followed by the Greek National Aggregator SearchCulture.gr for its data enrichment processes, as well as sharing the advantages and disadvantages of the approach and lessons learned along the way. Participants in the webinar also compare and discuss other different enrichment strategies and gather input which will inform future strategies.