Polity Kostroma Principality

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Was one of the many Russian Principalties that existed in the Middle Ages and were later inglobated either into Russia or Lithuania.

Establishment

  • January 1248: The Kostroma Principality separated from the Vladimir-Suzdal principality around 1247.

Chronology

Interactive Chronologies with maps are available in the section Changes Navigation

1. Events

  • January 1278: The Kostroma principality returned to the Vladimir principality.
  • January 1294: In 1293 the Grand Duke of Vladimir Dmitry Alexandrovich ceded the lands of the Kostroma principality to his brother Andrei.

Disestablishment

  • January 1321: After the death of prince Boris, Kostroma passed under the control of the Moscow princes.