Deepening Fragmentation of Poland under Bolesław III

Timeline

1. 1090–1095Kraków · Lesser PolandGrand Duke Władysław I Herman relied on his favorite Zbigniew Hebrydowicz to manage court affairs while his sons held local lands; central control over Masovia, Silesia, and other borderlands was limited, giving the duchy a polycentric character of governance.
2. 1096–1099Central Poland · PolandThe lawful heir Zbigniew and his younger brother Bolesław III competed for influence with support from court factions; fraternal conflict intertwined with local lords' interests, weakening Piast unity and pushing further privatization of territories.
3. 1098–1099Polish duchies · PolandBy the late 1090s, dukes of the borderlands grew increasingly autonomous in taxation, justice, and military affairs; grand ducal authority relied more on personal alliances than unified institutions, and the fragmented structure of Poland's political map was clearly visible by the turn of the century.