Béla Bartók’s Mikrokosmos (German for Microcosm) Sz. 107, BB 105 consists of 153 progressive piano pieces in six volumes written between 1926 and 1939.
The individual pieces progress from very easy and simple beginner étudesto very difficult advanced technical displays, and are used in modern piano lessons and education. In total, according to Bartók, the piece «appears as a synthesis of all the musical and technical problems which were treated and in some cases only partially solved in the previous piano works.
All of the six volumes progress in difficulty, namely: