The Op. 68 mazurkas by Frédéric Chopin are a set of four mazurkas composed around 1830-1846 and posthumously published in 1855. A typical performance of all four mazurkas lasts around nine minutes. * Mazurka in C major, Op. 68, No. 1 * Mazurka in A minor, Op. 68, No. 2 * Mazurka in F major, Op. 68, No. 3 * Mazurka in F minor, Op. 68, No. 4 (advertised as "Chopin's last composition", even though it was not)