Maria Callas - Donizetti: Anna Bolena (Milano, 14/04/1957)(2CD) Callas's Anna Bolena at La Scala in 1957 was one of the absolute highlights of her extraordinary career. The performances brought new life toabel cantoopera that had long fallen out of favour. The central role was ideally suited tohertalents andsheonce again hadLuchino Viscontias her director. Anna's rival, Giovanna Seymour, was sung by one Callas's mosttrusted colleagues, thesuperbmezzo-soprano Giulietta Simionato. The conductor, Gianandrea Gavazzeni, described the production as"a complete revelation of what I have always felt should be the ideal collaboration between stage and music".