In the Autumn of 1918 Frida Rubiner visited Vienna : her motives , according to her own reports , were more artistic than political , and she probably returned to Zürich before the end of the year . Some ( though not all ) sources indicate that one or both of the Rubiners were expelled from Switzerland at the end of 1918 . In February 1919 they returned to Berlin , and while Ludwig Rubiner took a job with a publishing house , his wife embarked on a trip to Kaunas and Vilnius to visit relatives in the war torn former western territories of the Russian empire . She ( probably ) participated - possibly without any " official mandate " - in the founding congress of the Communist International ( Comintern ) which took place in Moscow early in March 1919 . She had certainly been an early member - some sources say one of the ( many ) co-founders earlier that year - of the Communist Party of Germany
founding congress
1st Congress of the Comintern
Frida Rubiner