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Keywords from Image Description:
Pietro Ottoboni by Franciscus Trevisanus. en Cardinal Pietro Ottoboni portrait by Franciscus Trevisanus Patritius Venetus originally ublished in Osservazioni per ben regolare il coro dei cantori della capella pontificia Rom hinter XLIV des Vorworts vgl org page Scan bei Archive org oder in besserer Qualitt google de id xCAAAAcAAJ