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Joris Hoefnagel Forum Vulcani The Hot Springs at Pozzuoli. en Joris Hoefnagel Forum Vulcani The Hot Springs at Pozzuoli pen and brown ink with traces of black chalk overall cm National Gallery of Art Washington circa nga gov html Creator Joris Hoefnagel PDold Maps and topographical views by Joris Hoefnagel Solfatara Pozzuoli