Mezzo-soprano Delores Ziegler gradually built her career, first in concert work then in opera, though largely basing her activity in the U.S. After her 1981 European debut in Bonn, however, she became an international presence, centering many of her engagements in Germany, Italy, and England. She eventually debuted at the Met, and then appeared at most of the major opera houses in the U.S., including the Lyric Opera in Chicago and the San Francisco Opera. Ziegler is probably best known for her numerous portrayals of Dorabella in Mozart's Così fan tutte. In fact, she has record...