Famille originaire de Romagne, régna sur le Duché de Milan de 1450 à 1535
Idref is the authority database (author, title) of the union catalogue for France's higher education libraries (SUDOC)
The Virtual International Authority File (VIAF) is an international authority file. It is a joint project of several national libraries
DBpedia is a project aiming to extract structured content from the information created as part of the Wikipedia project.