 As Marta Paula, she made her professional debut in the fall of 1908 in Italy playing rolls such as the Mother in Amilcare Ponchielli's "La Gioconda" and Maffio Orsini in Gaetano Donizetti's "Lucrezia Borgia".Two years later she was engaged at London's Covent Garden Theatre for a season or two before accepting an offer by opera impresario Andreas Dippel to join the Chicago-Philadelphia Grand Opera Company in the fall of 1911.As Marta Wittkowska, she sang for Metropolitan Opera House in Philadelphia, the Met in Manhattan and opera companies in St. Louis, Syracuse, Chicago, Cincinnati and Detroit.