MIMO, for short. Linky: http://www.mimo-db.eu/mimo/infodoc/default.aspx
They only have 45,479 images and 1,306 recordings ....MIMO began life as a consortium of eleven of Europes most important musical instruments museums which came together for a project that aimed to create a single online access point to their collections. The MIMO Project, which was part funded through the European Commissions eContentplus programme, ran from September 2009 until August 2011 and successfully achieved all of its objectives.