In 1900, the then-unknown pianist Artur Schnabel was hired to accompany Behr, who already had a successful international career, on a concert tour in East Prussia.

They frequently performed together, and it was Behr's fame as a singer of Lieder—and her insistence that her husband accompany her—that drew the public's attention to Schnabel's ability as a pianist.

In 2006, the municipality of Schwyz declared the grave site a protected monument wherefore it is exempted from regulations that stipulate the removal of the remains after a certain period.

[6] Behr began her singing career as a student of Julius Stockhausen in Frankfurt am Main, and continued her musical education with Franz Wüllner in Cologne.

[1][4][7] This performance, which featured the music of Schubert and Brahms, was received very positively: the Allgemeine musikalische Zeitung declared that "a genuine high priestess of the art has arisen once again.

[9] Reviewer Wilhelm Kienzl wrote of the ensemble, "The characters of the four beautiful voices fit unusually well together, as if they had been selected with love and understanding from hundreds of singers by someone with a fine ear.

Schnabel's biographer César Saerchinger remarked that "it was a hazardous undertaking for a woman to sing this intensely romantic song cycle, set to a series of poems which so obviously are the outpourings of a love-sick youth, and which in the realistic public's mind called for a man's voice.

They repeated this feat in the Schubert centennial year 1928 in concerts that critic Alfred Einstein described as "the highest possible integration of interpretative powers applied to deep and sincere feeling".

Her students include Doda Conrad, Tilla Durieux, Eva Leßmann, Hilde Ellger, Gertrud Hindemith, Sabine Kalter, Lotte Leonard, Peter Pears, Maria Stader, Erika Stiedry-Wagner, Mary Simmons, and Randolph Symonette.

[citation needed] Behr was best known as a singer of Lieder, but she was also acclaimed as a soloist with orchestra; her early career saw performances with conductors Arthur Nikisch, Felix Weingartner, and Richard Strauss.

[4] British writer and friend of the family Edward Crankshaw wrote, "There are not many people who have the least idea either of the wonderful musicianship of Therese Behr Schnabel, ... or of the debt her husband owed to her.