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Pisanello disegni museum boymans van beuningen I. r. Artwork Creator Pisanello LangSwitch Metalpoint pen and brush in brown on parchment Metaalstift pen en penseel in bruin op perkament Museum Boijmans object history Franz Koenigs br ProvenanceEvent loan LangSwitch das the au het Boijmans Rotterdam LangSwitch die the la de Stichting