text: The d 'Estes ' Palazzo dei Diamanti ( 9,000 pointed pieces of diamond-shaped marble on its walls ) houses the Pinacoteca Nazionale , with notable works of the Ferrara masters Cosmy Tura , Ercole de ' Roberti , Garofalo , and Dosso Dossi .
  
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  There are works by Garofalo in the Pinacoteca Nazionale .