Ms. Rosenberg, 56, has spent some 30 years in Germany, the last 10 as co-general director of the Stuttgart Opera.

Before moving to San Francisco she spent a decade as co-director of the Stuttgart Opera.

She went on to perform Isolde in 1952 and joined the Stuttgart Opera.

She then sang in Frankfurt (1935-41), and joined the Stuttgart Opera in 1941.

She joined the Stuttgart Opera in 1912 and the Munich Opera in 1919.

He later became a conductor, joining the Stuttgart Opera in 1927.

However six weeks later, he was appointed music director of the Stuttgart Opera.

Förster sang several leading roles at the Stuttgart Opera in 1885 through the summer of 1886.

He was given a contract with the Stuttgart Opera, where he sang from 1850-1872.

He performed with the Stuttgart Opera.