Jan van de Cappelle
... that the Dutch marine artist Jan van de Cappelle is the only person known to have had his portrait painted by both Rembrandt and Frans Hals, but both paintings are now untraced?
... that the Dutch <a href="./Marine_art" id="mwDnI" rel="mw:WikiLink" title="Marine art">marine artist</a> <b id="mwDnM"><a href="./Jan_van_de_Cappelle" id="mwDnQ" rel="mw:WikiLink" title="Jan van de Cappelle">Jan van de Cappelle</a></b> <i id="mwDnU">(1654 work pictured)</i> is the only person known to have had his portrait painted by both <a href="./Rembrandt" id="mwDnY" rel="mw:WikiLink" title="Rembrandt">Rembrandt</a> and <a href="./Frans_Hals" id="mwDnc" rel="mw:WikiLink" title="Frans Hals">Frans Hals</a>, but both paintings are now untraced?