How old was Johannes Riemann in Prater?

Henny PortenHenny Porten was 34 in Prater as 'Annemarie'.

Birthday: Tue, Jan 07 1890 –
Sat, Oct 15 1960

Angelo FerrariAngelo Ferrari was 27 in Prater as 'Marquis de Monroir'.

Birthday: Sat, Aug 14 1897 –
Fri, Jun 15 1945

Johannes RiemannJohannes Riemann was 36 in Prater as 'Fritz'.

Birthday: Thu, May 31 1888 –
Wed, Sep 30 1959

Carl de VogtCarl de Vogt was 39 in Prater as 'Martin'.

Birthday: Mon, Sep 14 1885 –
Mon, Feb 16 1970

Peter Paul FelnerPeter Paul Felner was >> in Prater as 'Director, Writer'

Birthday: Unknown Birthday