Home›12th-century establishments in Poland›Duchy of Masovia🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiРусскийالعربية中文日本語EntityQ2361927· pop 21· linked from 231 articlesDuchy of MasoviaPolish VassalWikidata factsShow 4 more factsinception1138-00-00dissolved, abolished or demolished date1526-00-00Commons categoryDuchy of Masovianative labelKsięstwo mazowieckieSources (2)pl.wikipedia.orgru.wikipedia.orgvia Wikidata · CC0Available in 21 languagesEspañolFrançaisDeutsch中文日本語РусскийItalianoالعربيةbe_x_oldBelarusianConnectionsMasoviaEntityKuyaviaEntityCategories12th-century establishments in PolandDuchies of PolandFiefdoms of PolandFormer duchiesFormer monarchies of EuropeFormer principalitiesHistory of Masovian VoivodeshipHistory of MazoviaMasovian Voivodeship articles missing geocoordinate dataStates and territories disestablished in 1526States and territories established in 1138