areas in great numbers. Still, Mazovia was among the most densely populated provinces of Poland, together with Łęczyca Land, Kujawy and Dobrzyń Land". Municipal government Seat of the Voivodeship Governor (Wojewoda): Warsaw Administrative division Ciechanów Land (ziemia ciechanowska, Ciechanów) Czersk Land (ziemia czerska, Czersk) Liw Land (ziemia liwska, Liw) Łomża Land (ziemia łomżyńska, Łomża) Nur Land (ziemia nurska, Nur) Różan Land (ziemia różańska, Różan) Warszawa Land (ziemia warszawska, Warsaw) Wizna Land (ziemia wiska, Wizna) Wyszogród Land (ziemia wyszogrodzka, Wyszogród) Zakroczym Land (ziemia zakroczymska, Zakroczym) Voivodes Feliks Brzeski (1517–1545) Stanisław Warszycki (1630–1651) Stanisław Poniatowski (from 1731) Andrzej Mokronowski (from 1781) Sources Masovian Voivodeship, description by Zygmunt Gloger Voivodeships of the Polish–Lithuanian Commonwealth 1526 establishments in Poland 1795 disestablishments in the Polish–Lithuanian Commonwealth