Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Thérèse Johanne Alexandra Tietjens (July 17, 1831, Hamburg - October 3, 1877, London) was a leading opera and oratorio soprano singer of Hungarian origin. Born in Hamburg, Germany, she made her career chiefly in London in the 1860s and 1870s. During her prime, her powerful yet flexible voice was said to span three octaves. Many opera historians consider her to have been the finest dramatic soprano of the second half of the 19th century.