She was the founder of
nursery schools in
Hungary on July 1, 1828, after
Robert Owen's example set in
New Lanark, Scotland in 1816. Soon the pre-school institution became famous all over Hungary and in 1837,
Friedrich Fröbel founded the first "kindergarten" in Germany. One of
Ludwig van Beethoven's students, Therese was the dedicatee for his
Piano Sonata No. 24 (in F major, Opus 78), and some writers speculated that she—not her sister
Josephine who is generally accepted as the addressee—may have been the intended recipient of Beethoven's letter to the "
Immortal Beloved". Her memoirs were first published by
La Mara, who subscribed to this theory. and her diaries and notes (up to 1813) by Marianne Czeke, both claiming to reveal much about the relations between
Beethoven and the Brunsvik family, in particular her sister
Josephine. ==References==