Sabine Kalter was a Polish opera

Opera

Opera is an art form in which singers and musicians perform a dramatic work combining text and musical score, usually in a theatrical setting. Opera incorporates many of the elements of spoken theatre, such as acting, scenery, and costumes and sometimes includes dance...

tic mezzo-soprano

Mezzo-soprano

A mezzo-soprano is a type of classical female singing voice whose range lies between the soprano and the contralto singing voices, usually extending from the A below middle C to the A two octaves above...

. She made her professional opera debut at the Vienna Volksoper

Vienna Volksoper

The Vienna Volksoper is a major opera house in Vienna, Austria. It gives about three hundred performances of twenty-five productions during an annual season running from September through June....

 in 1911. From 1915-1935 she was a leading artist at the Hamburg State Opera

Hamburg State Opera

The Hamburg State Opera is one of the leading opera companies in Germany.Opera in Hamburg dates back to 2 January 1678 when the "Opern-Theatrum" was inaugurated with a performance of a biblical Singspiel by Johann Theile...

. She was then committed to the Royal Opera House

Royal Opera House

The Royal Opera House is an opera house and major performing arts venue in Covent Garden, central London. The large building is often referred to as simply "Covent Garden", after a previous use of the site of the opera house's original construction in 1732. It is the home of The Royal Opera, The...

in London from 1935-1939. After 1939 she no longer appeared in operas, but still performed in concerts and recitals in London. She taught singing in London during the 1940s and 1950s.