Principality of Novgorod-Seversk

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Was a medieval Rus' principality centered on the town now called Novhorod-Siverskyi (Ukraine).

Establishment

January 1133: The Principality of Novgorod-Seversk was formed as part of the Chernigov principality in 1097. Following the death of Mstislav I of Kiev in 1132, the semi-autonomous states were de facto independent.

Chronology

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1. Fragmentation of the Kievan Rus´

Following the death of Mstislav I of Kiev in 1132, the semi-autonomous states of the Kievan Rus' were de facto independent.

2. Conquests of Algirdas

Expansion during the rule of Algirdas in the Grand Duchy of Lithuania.

January 1357: Expansion of Lithuania by 1356.

January 1363: The Principality of Novgorod-Seversk became part of the Grand Duchy of Lithuania.

3. Further events (Unrelated to Any War)

January 1147: In 1146, the territory of Putivl was mentioned for the first time in historical records.

January 1153: Rylsk was first mentioned in chronicles in 1152.

January 1157: Vshchizh principality was an appanage principality within the Chernigov principality which existed from 1156 to 1239.

January 1158: Starodub was detained by Izyaslav Davydovich during his transition to Kiev and the occupation of the Chernigov reign by Svyatoslav Olgovich in 1157.

January 1165: The Trubchevsky Principality separated from the Novgorod-Seversky principality after 1164.

January 1203: Establishment of the Vorgol principality.

January 1236: Establishment of the Kozelsk Principality.

January 1247: The Glukhovskoe Principality was established around 1246 in Glukhov.

January 1247: Creation of the Bryansk Principality.

January 1276: With the death of Vasily, the Kursk princely dynasty ended.