KARYL LYNN ZIETZ, a noted opera expert, is the Americancorrespondent for the publication about Teatro Alla Scala in Milan,and writes for Opera Now in London, Orpheus in Berlin, and OperaAustralasia in Sydney. She is the author of Opera! The Guide toWestern Europe's Great Houses and Opera Companies of the UnitedStates. THE NATIONAL TRUST FOR HISTORIC PRESERVATION is the only private,nonprofit organization chartered by Congress to encourage publicparticipation in the preservation of sites, buildings, and objectssignificant in American history and culture.