Question: Where was the place of death of Henrietta Treffz's husband?
Sentence (from "Henrietta Treffz"): Henrietta "Jetty" Treffz (1 July 1818, in Alsergrund – 8 April 1878, in Hietzing) was best known as the first wife of Johann Strauss II and a well-known mezzo-soprano appearing in England in 1849 to great acclaim.
Relevant evidence: Yes