She was born on 2 September 1765 in Sarmingstein, Austria, and died before April 1811, in Bresane, Croatia.
After her marriage she moved to Kreuz in Croatia, where her spouse Cornelius Bujánovics von Agg-Telek (c.1770–1844) had his estate.
Both the concertos that Mozart wrote for her are of the highest quality, and the piano parts are testing, suggesting she was highly accomplished both technically and musically.
On June 9, 1784, he wrote to his father: "I am fetching Paisiello in my carriage, as I want him to hear both my pupil and my compositions."
This pupil was Barbara Ployer, of whom he made a portrait-sketch in the margin of one of his compositions, reproduced in the sheet music for Mozart's Sonata in D Major KV.