Clara Anna Fisher, 1880- ?

I am searching for any information on when my mother's Aunt died in Prague. Clara Anna Fisher ( Cermak ) was born in New York 11 Feb 1880, lived in Chicago, married Ludvik ( Louis ) Fischer, MD in 1908, and moved back to Prague in 1919. He died in 1945, and she likely died around 1970.

Thank you!

David Etges