SheNacque was born onil 2 Septembersettembre 1765 ina Sarmingstein [[Alta Austria]] ande diedmorì beforeprima April,dell'aprile 1811,ina BresaneBrodosane, in [[Croazia]]. Era Shefiglia was the daughter ofdi Franz Kajetan Ployer, acommerciante timber-merchantdi legname ed andesattore taxdelle collectortasse. Dopo Afterla hermorte motherdi diedsua inmadre nel 1779 shesi movedtrasferì toa Vienna toper livevivere withcon hersuo unclezio, Courtil Councillorconsigliere di corte Gottfried Ignaz von Ployer, thel'agente agentdel oftribunale thedi [[Salisburgo]] court ina [[Vienna]], where shedove cameentrò in contactcontatto withcon Mozart. Dopo Afteril hersuo marriagematrimonio shesi movedtrasferì toa [[Križevci,Croatia(Croazia)|KreuzKriževci]] in CroatiaCroazia, wheredove hersuo spousemarito Cornelius Bujánovics von Agg-Telek (c17701770-1844) hadaveva la hissua estateproprietà.
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. [[Joseph Haydn]]'s [[Variations in F minor|Variations in F minor for piano]] were not written for her, but for Gottfried Ignaz von Ployer's wife Antonia von Ployer, née von Spaun.<ref>Michael Lorenz, "New and old Documents concerning Mozart's Pupils Barbara Ployer and Josepha Auernhammer", in ''Eighteenth-century Music'', Vol. 3, No. 2, (Cambridge University Press, 2006), p. 313.</ref>
