Anton de Kontski was a polish pianist and composer born October 27, 1817 in Kraków and death in the same city December 7, 1899. In polish language his name is wrote: Antoni Kątski and in french: Antoine de Kontski. He was sometimes also called “Chevalier.” Anton was a student of John Field in Moscow and was considered a child prodigy. About his life we know that he performed a concert together with Chopin in 1845 in Paris. This piece is a Meditation about the history of the Ungru Castle Ruines.
The Nocturne in C-sharp minor, Op. posth., called also Lento con gran espressione was composed by Frédéric Chopin in 1830 and published posthumous in 1870. Chopin dedicated this composition to his older sister, Ludwika Chopin, with the statement: "To my sister Ludwika as an exercise before beginning the study of my second Concerto". It is sometimes also called Reminiscence.