After two years of preparing, rehearsing and studying its repertoire, Mazowsze staged its premiere in the Polish Theatre in Warsaw on 6 November 1950.

In between the concerts after the premiere in Warsaw Mazowsze continued to enhance the programme, planned next undertakings and made important decisions.

The first country they visited was the Union of Soviet Socialist Republics, understandable in those days due to Poland's geopolitical situation.

In the fifties, Mazowsze gave the opportunity to sing to such great Polish singers as Irena Santor or Lidia Korsakówna.

[2] In 1999 Mazowsze also appeared in Andrzej Wajda’s movie Pan Tadeusz, in the scene of the traditional Polish dance – the Polonaise.