Luisa Tetrazzini was an Italian coloratura soprano of great international fame. Tetrazzini "had a scintillating voice with a brilliant timbre and a range and agility well beyond the norm...". She enjoyed a highly successful operatic and concert career in Europe and America from the 1890s through to the 1920s. Her voice lives on in recordings made from 1904-1920. She wrote a memoir, My Life of Song, in 1921 and a treatise, How to Sing, in 1923. After retirement, she taught voice in her homes in Milan and Rome until her death.