After submitting a formal note of protest to the Allies against
blocking German-Austrian union, on 10 September 1919,
Chancellor Karl Renner signed the Treaty of Saint Germain, which
was ratiﬁed on 17 October by the Constituent National Assembly.
According to its provisions, on 21 October 1919 the name of the
country changed from the Republic of German-Austria to the
Republic oFAustria, commonly referred to as Austria.