Helena Moreira de Sá e Costa GOSE (26 May 1913 – 9 January 2006) was a pianist, concert performer and teacher.

[2] She completed her course at Lisbon National Piano Conservatory with a maximum mark of 20 out of 20, having been taught by her parents and Vianna da Motta.

She worked with all the Portuguese orchestra conductors, including Ernest Ansermet, Igor Markevitch, Paul Klecki and Swarowky.

Among the artists she worked with in concert performances were Pierre Fournier, Pablo Casals,[5] Maurice Gendron, Sándor Végh, Arthur Grumiaux, János Starker, L. Hoelscher, Ruggiero Ricci, Stich-Randall, Rita Gorr, and Zara Nelsova.

[6] She taught in the Lisbon and Porto conservatories, and also oversaw courses in Cascais, Espinho, Estoril, Salzburg (Austria), Gunsbach (Albert Schweitzer Centre, in Alsace, France), Switzerland, Italy, England, Germany, Canada and America.