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Jacob Speyer. nl Leids hooglerarenportret van Jacob Samuel Speyer Bijzondere Collecties Universiteitsbibliotheek Leiden date Bijzondere Collecties Unversiteitsbibliotheek Leiden Icones Leidenses Johannes Josseaud askart aspx artist Netherlands PDold Uploaded with Johannes Josseaud Leiden University faculty Icones Leidenses