The Mazurka in D, sometimes called 'Mazurek', is believed to be an early work by Frédéric Chopin. Its composition date is usually set around the year 1820 (when Chopin was 10 years old). It was first published in 1910. As it doesn't have a proper Opus number, it is usually referred to as B. 4, and KK Anh. Ia/1 according to its entry numbers in the Brown and Kobylanska catalogues respectively. A standard performance lasts around one minute.
