 BBC News | Swedish soprano Birgit Nilsson dies Seattle Post Intelligencer - STOCKHOLM, Sweden -- Birgit Nilsson, whose prodigious voice, unrivaled stamina and thrilling high notes made her the greatest Wagnerian soprano of the post-World War II era, has died at the age of 87. Swedish Soprano Birgit Nilsson Dies Swedish Wagnerian soprano Nilsson dies aged 87 |