Fourteen libraries and library networks from all over Europe are partners of the EROMM consortium. They joined forces to build and develop the EROMM Classic database and run the other EROMM Services. They collect records of their own and from other libraries in their country and make them available to the EROMM Secretariat for integration into the database.

Signatories to the EROMM Agreement are

• Biblioteca Nacional, Lisboa, Portugal
• Bibliothèque cantonale et universitaire, Lausanne-Dorigny, Switzerland
• Bibliothèque nationale de France, Paris, France
• Bibliothèque Royale de Belgique / Koninklijke Bibliotheek van België, Brussels, Belgium
• British Library, London, United Kingdom
• ETH-Bibliothek, Zürich, Switzerland
• Gemeinsamer Bibliotheksverbund - Verbundzentrale, Göttingen, Germany
• Kansalliskirjasto, Helsinki, Finland
• Det Kongelige Bibliotek, Kopenhagen, Denmark
• Koninklijke Bibliotheek, ‘s-Gravenhage, The Netherlands
• Kungliga biblioteket, Stockholm, Sweden
• Národní knihovna Ceské republiky, Praha, Czech Republic
• Niedersächsische Staats- und Universitätsbibliothek, Göttingen, Germany
• Российская национальная библиотека, St. Petersburg, Russia

See the EROMM Agreement