From the project website (accessed 14 January 2020)
The Manuscriptorium project is creating a virtual research environment providing access to all existing digital documents in the sphere of historic book resources (manuscripts, incunabula, early printed books, maps, charters and other types of documents). These historical resources, otherwise scattered in various digital libraries around the world, are now available under a single digital library interface.
The user interface is designed for easy searching and viewing of documents and it enables the creation of personal collections and virtual documents. This means users and contributors of content can create their own virtual libraries from the aggregated content and share the results of their work with students, colleagues and other users.
Manuscriptorium is a Europeana sub-aggregator for the sphere of historical resources.