Marian Rosenfeld was born in Lucerne and had her first piano lesson at the age of five. With thirteen years she was admitted to the master class of Homero Francesch in Zürich, where she took her final concert exam with distinction in 1987. She continued her studies in Freiburg i.B. with Vitalij Margulis and in Geneva with Edith Murano. Participating in masterclasses (among others with György Kurtág, Bernard Greenhouse or András Schiff) is her way of completing her artistical education. At this moment, she is studying in Berne with Bruno Canino.
In 1981, she won the first prize of the Swiss Youth Competition of Music and 1986 the second award at the Eurovision Competition for Young Musicians. For several years, Marian Rosenfeld was entitled to a scholarship from Migros Cooperatives.
The young pianist already boasts a remarkable concert experience. Her appearances brought her to Vienna, London, Salzburg or Berlin; important engagements were the Prague Spring Festival, the Opera festival Savonlinna and the Interartforum at Fertöd/Hungary and concerts with the Mozarteum Orchestra Salzburg, the Munich Chamber Orchestra, the Festival Strings Lucerne, the Chamber Orchestra of Zurich and the Radio Symphony Orchestra Basle. Repeated invitations to record for European broadcasting and television corporations round up her activities.
An important part of her work is an intensive occupation with chamber music. The Piano Duet with her husband Horacio Gagliano has also made several recordings at different European Broadcasting corporations. In 1986, she won the third prize at the International Competition of ARD, with her brother Rafael Rosenfeld, in the category Cello/Piano. Finally, in 1997, the "Rosenfeld-Trio" with Marian, Rafael and Susanne Rosenfeld-Mathé was the winner of the Swiss Chamber Music Competition of the Migros Cooperative.