Regents of Mazovia and Kuyavia

Today Mazovia and Kuyavia compose the central part of Poland (the capital Warsaw is located in Mazovia). But in medieval time was this region often ruled without much regard to the Polish central power. A pagan uprising c. 1037 meant that Mazovia in practise was independent  for a whole decade. The province's time as self-governing principality began however first with the division of Poland between the heirs of the late prince in 1138. At that time was four hereditary Polish principalities created, which formally lay under the sovereignty of the prince of Krakow. But this overlordship was only theoretical and during the following 400 years was there one or more Mazovian principalities who effectively was outside the Krakow princes' and later the Polish kings' control (they even recognised Bohemia's overlordship instead of Poland's 1329-1351). Just like what had happened in 1138 was Mazovia partitioned several times between sons to former princes. Kuyavia became a principality of its own already in 1186 and its prince restored the Polish kingdom in the year 1320. Mazovia however continued to exist as a self-governing part of Poland until 1526 when the branch of the House of Piast that had ruled Mazovia became extinct, whereupon the province was returned to the Polish king.

Principality of Mazovia

c. 1037-1047 1047-1138	Mieclaw Part of Poland
1138-1173	Boleslaw Kedzierzawy
1173-1186	Leszek
1186-1194	Kazimierz Sprawiedliwy
1194-1200	Helena znojemska (regent)
1194-1198	Leszek Bialy (Kuyavia 1198-1202)
1194-1247	Konrad I
1247-1248 1248-1262 1262-1264 1262-1294 1262-1313	Boleslaw I Siemowit I Prejeslawa (regent) Konrad II (only Czersk from 1275) Boleslaw II (only Plock 1275-94)
Mazovia is 1313 partitioned into Czersk, Plock and Rawa Principality of Kuyavia
1138-1186 1186-1195	Part of Mazovia Boleslaw Mieszkowic
1195-1198	Mieszko Stary (the Old)
1198-1200	Part of Mazovia
(1198) -1202	Leszek Bialy (the White)
1202-1233	Konrad I
1233-1267	Kazimierz
1267-1288	Leszek Czarny (the Black)
1267-1299	Wladyslaw Lokietek (the Short)
1299-1305	Waclaw I (house of Přemysl)
1305-1306	Waclaw II (house of Přemysl)
1306- (1333)	Wladyslaw Lokietek (restored)
Kuyavia become a part of the Polish king's domains in 1320

Principality of Mazovia

Mazovia returns to the Polish crown 1526