The Mazovian Musical Theatre "Operetta" then theatre which came into being with thought about this would restore rank and popularity rank and popularity operetta. The Mazovian Musical Theatre theatrical preierę of 17 September of 2005 year, theatrical premiere " the bat's Vengeance" Joanna the Straussa in Congress Hall in Warsaw. The activity the stage MTM preceded the "Operetta" the recording of plate " the bat's Vengeance" - first record in history of fonografii of whole operetta in Polish language. It to serial events was can number "Merry Widow" and the "Ksieżniczka of Czardas" as well as the concert "Polish Tenors of John's Memory the Kiepury as well as the educational educational performance the "Child in land of Music". They be given plate CD also and DVD Live as well as book of Wacław's authorship the Panka pt." Brunette, Blodynki..." and different. It the main aim the artistic ęłęófounder is the spectators' conviction to full the lightness and the melodiousness of farcical style of singing. Across szerg of the creator's performances the ęłęóto aspire to return of glitter of magnificence operetta.