Among the elite so-called classical singers of the 20th century's second half, Teresa Berganza, who died in Madrid, her native city, on May 13 at the age of 89, stood out in the happiest and most rewarding way. Her career is celebrated here in an obituary by Max Loppert, and she is remembered by her fellow singer Placido Domingo, by Joan Matabosch, the artistic director of Madrid's Teatro Real, and by Christopher Webber, an authority on zarzuela.