Elvira de Hidalgo

Elvira de Hidalgo was a prominent Spanish coloratura soprano, who later became a pedagogue. Her most famous pupil was Maria Callas.

She was born in Valderrobres, Teruel Province , as Elvira Juana Rodrguez Rogln. She was a pupil of Melchiorre Vidal, who also taught Maria Barrientos, Graziella Pareto, Julin Gayarre, Fernando Valero, Francesco Vignas, and Rosina Storchio.

Source: Wikipedia