kəzlˈoʊski kəmpˈoʊzd ɐ fˈeɪməs ɹˈɛkwɪˌɛm mˈæs ɪn ˈiː flˈæt mˈaɪnɚ mˈɪsə pɹˈoʊ dᵻfˈʌŋktiz fɚðə dˈɛθ ʌv stˈænɪslˌɔː ˈɔːɡəst pˌoʊnɪɐtˈoʊski, ðə kˈɪŋ ʌv pˈoʊlənd wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd θˈɜːɾi tˈuː wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd nˈaɪnti ˈeɪt, kəmˈɪʃənd baɪ ðə kˈɪŋ hɪmsˈɛlf bᵻfˌoːɹ hɪz dˈɛθ ænd pɚfˈɔːɹmd ˌɔn twˈɛnti fˈaɪv fˈɛbɹuːˌɛɹi wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd nˈaɪnti ˈeɪt ɪn sənt pˈiːɾɚzbˌɜːɡ.
Kozłowski composed a famous Requiem Mass in E flat minor Missa pro defunctis for the death of Stanisław August Poniatowski, the King of Poland (1732–1798), commissioned by the King himself before his death and performed on 25 February 1798 in St Petersburg.