1 in C minor, Op. 4 (1828), composed while he was studying with Elsner. As Chopin's only composition teacher in 1823-29, Elsner taught him music theory and composition; Elsner diaried of Chopin: "Chopin, Fryderyk, third-year student, amazing capabilities, musical genius." On 18 April 1854, Elsner died at his estate named for himself, Elsnerów, which now lies within the Warsaw city limits. Works - summary Elsner's compositions included operas Leszek Biały (Leszek the White) and Król Łokietek (about Władysław I the Elbow-high) oratorio, Męka Pana Naszego Jezusa Chrystusa (The Passion of Our Lord Jesus Christ) eight symphonies polonaises, waltzes, marches Mass in B-flat major and Mass in F major Nieszpory do NMP (Vespers for the Most Sacred Virgin Mary). Elsner was one of the first composers to weave elements of Polish folk music into his works. He also wrote Sumariusz moich utworów muzycznych (Summary of My Musical Works, published 1957). Works - detailed list List of the most important compositions: Masses Missa brevis in F major, Op. 85 on 3-voice male choir and organ (1844) Festiva Missa in C major, Op. 52 for 4-voice choir, orchestra and organ (c. 1832) Missa in B, Op. 18 on 3-voice male choir (1823) Mass in A minor, Op. 24 for 4-voice choir (c. 1823) Mass in A minor, Op. 81 for 4-voice choir and orchestra (1843) Mass in B-flat major, Op. 3 to 4-voice choir and orchestra (1799) Mass in B-flat major, Op. 44 for 2 sopranos, 2 tenors, bass and organ (1829) Mass in B-flat major, Op. 80 for 4-voice choir and organ (1843) Mass in C major, Op. 22 for 4-voice male choir, 4 horns, trombone and timpani (c. 1823) Mass in C major, Op. 26 for 4 solo voices, 4-voice choir and orchestra (1820) Mass in D minor and D major in Laudem omnium sanctorum slavonorum Polonorum, Op. 66 for 2 solo voices, 4-voice choir and orchestra (1840) Mass in D minor, Op. 16 for 4-voice choir (1823) Mass in D minor, Op. 5 for 4-voice choir and orchestra (c. 1806) Mass in E minor - E-flat major, Op. 62 for 4 solo voices, 4-voice choir and orchestra (c. 1838) Mass in E minor, Op. 88 for 4-voice choir and organ (1846) Mass in F major, Op. 20 for 4-voice choir (c. 1823) Mass in F major, Op. 35 for 4-voice choir and organ (c. 1825) Mass in F major, Op.