Marchlewszczyzna
Marchlewszczyzna (Ukrainian: Мархлевський польський національний район; Russian: Мархлевский польский национальный район) was a Polish National District in the Ukrainian Soviet Socialist Republic created as an experiment and as part of the Soviet korenizatsia campaign in Zhytomyr Okruha to the west of Zhytomyr on 21 July 1925 by resolution of the Little Presidium of the All-Ukrainian Central Executive Committee. Its capital, the town of Dovbysh, was renamed later in 1926 as Marchlewsk.