From the Europeana Blog:
The development department at Europeana have been working hard on a new interactive search and display feature that enables you to locate and preview search results on a map.
The map is automatically populated with the first 1,000 results from a search query and distributes them on a multi-layered map (OpenStreetMap, Google Physical, Google Street, Google Hybrid, and Google Satellite). Items are represented by purple circles, the higher the amount of results per area, the bigger the circle. Clusters of circles are distributed furher and more accuratly as users zoom in on areas and regions of interest. When you click on a circle, an overlay opens with a list of all the records for that specific location, displaying titles and geographic coordinates for each item. You can browse the results without leaving the overlay and access records with a full page display by clicking the title. The map is touch and swipe sensitive so it is possible to interact with the new map from devices such as the iPad and Android tablets.
See Also: Direct to Eurpopeana Search Map