In the introductory part of the film, we learn that between 1462-1796, Jews in Frankfurt lived mainly in the Judengasse, the Jewish ghetto. For a general overview of the History of Jews in Frankfurt, as well as more information about the historical Jewish Quarter, read this article by the Jewish Virtual Library.
When Erna lived in Frankfurt, her apartment was located close to the Eschenheimer Gate, a vital part of the Frankfurt cityscape. Read up on its history and look at old photographs.
Even though Erna's family was not orthodox, her father and grandfather attended the synagogue at Friedberger Anlage on High Holy Days. The synagogue was burnt down during Kristallnacht, you can look at the synagogue's very interesting homepage to learn more (Unfortunately, the website is only provided in German, but the introduction features amazing photos.)
On Yom Kippur, Erna's father and grandfather went to the synagogue. Find out more about this Jewish High Holy Day.
Erna's brother studied medicine in Munich and Berlin, and every time he returned to Frankfurt to visit his family, he took Erna to the famous Café Laumer. Check out what the Café Laumer looks like today.
After her apprenticeship as a goldsmith, Erna studied at the Städel School/School of Applied Arts in Frankfurt. Johann F. Städel died in 1817 and left all his money and his art collection to a foundation. The foundation then set up an institution to introduce people to the art collection. It also established a school for talented young students: the Städelmuseum and the Städelschule.
In the late 17th/early 18th centuries, Samson Wertheimer, an Austrian Court Jew and learned scholar, studied in Frankfurt and later established and financially supported a Talmud academy there. In addition to deciding matters of Jewish law, Wertheimer's influential position in the court enabled him to successfully prevent the anti-Semitic work, "Entdecktes Judentum," by J.A. Eisenmenger from being sold in Frankfurt.
Mayer Rothschild, patriarch of the Rothschild family, settled in Frankfurt in the mid-18th century. By the early 19th century his five sons had established banking houses in London, Frankfurt, Vienna, Paris and Naples. The Rothschild Palace in Frankfurt currently houses the Jewish Museum of Frankfurt.